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====== Screen use (<18) ======
[[Children|Underage]] participants were asked several questions regarding the use of electronic devices. Besides the questions in the general assessments, a large number of questions on screen used were excluded in the [[additional assessments|additional questionnaire]] [[BLUQ|Blue Light (BLUQ)]]. Related sections are [[Hobbies & activities >(<18)]] and [[Physical activity (<18)]]. \\

For adult participants questions on the use of electronic devices can be found in the subsections [[Electronic device use]] and [[Mobile phone use (MOB)]]. Besides, more detailed questions regarding electronic device use (and their effect on sleeping patterns) were asked to a subcohort of adults in the [[additional assessments|additional questionnaire]] on shiftwork ([[SHIQ]]).\\
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===== Variables =====
===Screen use children===
| **Label English**                                                                                                                                                                            | **Label Dutch**                                                                                                                                                                                              | **Code**                      | **Variable**     | **Assessment**                   | **Age**  |
| my child never had one / how old (xx years) was your child when it first got its own pc (personal computer)?                                                                                 | dat heeft mijn kind nooit gehad / hoe oud (xx jaar) was uw kind toen hij/zij voor het eerst een eigen pc (personal computer) kreeg?                                                                          | computer_own_chi_q_1_a        | chactive6c1      | [[1A General questionnaire|1A]]  | 8-17     |
| how old (xx years) was your child when it first got its own pc (personal computer)?                                                                                                          | hoe oud (xx jaar) was uw kind toen hij/zij voor het eerst een eigen pc (personal computer) kreeg?                                                                                                            | computer_own_chi_q_1_b        | chactive6c2      | [[1A General questionnaire|1A]]  | 8-17     |
| using the computer (including games computer, game boy, playstation etc) / how many hours a week, on average, did your child spend on this activity when it was between 4 and 7 years old?   | bezig met de computer (ook spelcomputer, gameboy, playstation e.d.) / hoeveel uur per week besteedde uw kind gemiddeld hieraan in de leeftijd van 4 t/m 7 jaar?                                              | computer_time_ch2a_q_1        | ch4_7yactive5b   | [[1A General questionnaire|1A]]  | 8-17     |
| using the computer (including games computer, game boy, playstation etc) / how many hours a week, on average, did your child spend on this activity from the age of 8 until the present?     | bezig met de computer (ook spelcomputer, gameboy, playstation e.d.) / hoeveel uur per week besteedde uw kind gemiddeld hieraan in de leeftijd van 8 jaar t/m nu?                                             | computer_time_ch3_q_1         | ch8yactive5b     | [[1A General questionnaire|1A]]  | 8-12     |
| using the computer (including games computer, game boy, playstation etc) / how many hours a week, on average, did your child spend on this activity when it was between 8 and 12 years old?  | bezig met de computer (ook spelcomputer, gameboy, playstation e.d.) / hoeveel uur per week besteedde uw kind gemiddeld hieraan in de leeftijd van 8 t/m 12 jaar?                                             | computer_time_ch3a_q_1        | ch8_12yactive5b  | [[1A General questionnaire|1A]]  | 13-17    |
| using the computer (including games computer, game boy, playstation etc) / how many hours a week, on average, did your child spend on this activity from the age of 13 until the present?    | bezig met de computer (ook spelcomputer, gameboy, playstation e.d.) / hoeveel uur per week besteedde uw kind gemiddeld hieraan in de leeftijd van 13 jaar t/m nu?                                            | computer_time_ch4_q_1         | ch13yactive5b    | [[1A General questionnaire|1A]]  | 13-17    |
| my child never had one / how old (xx years) was your child when it first got its own nintendo, game boy, playstation, etc?                                                                   | dat heeft mijn kind nooit gehad / hoe oud (xx jaar) was uw kind toen hij/zij voor het eerst een eigen nintendo, gameboy, playstation etc kreeg?                                                              | console_own_chi_q_1_a         | chactive6b1      | [[1A General questionnaire|1A]]  | 8-17     |
| how old (xx years) was your child when it first got its own nintendo, game boy, playstation, etc?                                                                                            | hoe oud (xx jaar) was uw kind toen hij/zij voor het eerst een eigen nintendo, gameboy, playstation etc kreeg?                                                                                                | console_own_chi_q_1_b         | chactive6b2      | [[1A General questionnaire|1A]]  | 8-17     |
| my child never had one / how old (xx years) was your child when it first got its own mobile telephone?                                                                                       | dat heeft mijn kind nooit gehad / hoe oud (xx jaar) was uw kind toen hij/zij voor het eerst een eigen mobiele telefoon kreeg?                                                                                | mobile_own_chi_q_1_a          | chactive6d1      | [[1A General questionnaire|1A]]  | 8-17     |
| how old (xx years) was your child when it first got its own mobile telephone?                                                                                                                | hoe oud (xx jaar) was uw kind toen hij/zij voor het eerst een eigen mobiele telefoon kreeg?                                                                                                                  | mobile_own_chi_q_1_b          | chactive6d2      | [[1A General questionnaire|1A]]  | 8-17     |
| using the telephone or texting / how many hours a week, on average, did your child spend on this activity when it was between 4 and 7 years old?                                             | telefoneren, sms-en / hoeveel uur per week besteedde uw kind gemiddeld hieraan in de leeftijd van 4 t/m 7 jaar?                                                                                              | mobile_time_ch2a_q_1          | ch4_7yactive5d   | [[1A General questionnaire|1A]]  | 8-17     |
| using the telephone or texting / how many hours a week, on average, did your child spend on this activity from the age of 8 until the present?                                               | telefoneren, sms-en / hoeveel uur per week besteedde uw kind gemiddeld hieraan in de leeftijd van 8 jaar t/m nu?                                                                                             | mobile_time_ch3_q_1           | ch8yactive5d     | [[1A General questionnaire|1A]]  | 8-12     |
| using the telephone or texting / how many hours a week, on average, did your child spend on this activity when it was between 8 and 12 years old?                                            | telefoneren, sms-en / hoeveel uur per week besteedde uw kind gemiddeld hieraan in de leeftijd van 8 t/m 12 jaar?                                                                                             | mobile_time_ch3a_q_1          | ch8_12yactive5d  | [[1A General questionnaire|1A]]  | 13-17    |
| using the telephone or texting / how many hours a week, on average, did your child spend on this activity from the age of 13 until the present?                                              | telefoneren, sms-en / hoeveel uur per week besteedde uw kind gemiddeld hieraan in de leeftijd van 13 jaar t/m nu?                                                                                            | mobile_time_ch4_q_1           | ch13yactive5d    | [[1A General questionnaire|1A]]  | 13-17    |
| does your child have a mobile phone?                                                                                                                                                         | heeft uw kind een mobiele telefoon?                                                                                                                                                                          | mob_mobilephone_chi_q_1       | chmob1           | [[2A child questionnaire|2A]]    | 4-12     |
| can your child use that telephone to access the internet? / does your child have a mobile phone?                                                                                             | is dat een telefoon waarmee uw kind op het internet kan? / heeft uw kind een mobiele telefoon?                                                                                                               | mob_mobilephone_chi_q_1_a     | chmob1a          | [[2A child questionnaire|2A]]    | 4-12     |
| on the days that your child sits in front of a screen, how many hours on average is that?                                                                                                    | op de dagen dat uw kind achter een beeldscherm zit, hoeveel uur zit uw kind dan gemiddeld achter een beeldscherm?                                                                                            | screentime_duration_chi_q_1   | chscreent2       | [[2A Child Questionnaire|2A]]    | 4-12     |
| on the days that your child sits in front of a screen, how many hours on average is that? add up all the time for television, tablet, telephone, (game) computer, laptop, etc.)              | op de dagen dat uw kind achter een beeldscherm zit, hoeveel uur zit uw kind dan gemiddeld achter een beeldscherm? tel de tijd voor televisie, tablet, (spel)computer, laptop, telefoon, etc. bij elkaar op.  | screentime_duration_chi_q_2   | chscreent2a      | [[3A Child Questionnaire|3A]]    | 4-12     |
| on how many days per week does your child sit in front of a screen (e.g. television, tablet, (gaming) computer, laptop, etc.)?                                                               | op hoeveel dagen per week zit uw kind achter een beeldscherm (denk aan televisie, tablet, computer, laptop, enz.)                                                                                            | screentime_frequency_chi_q_1  | chscreent1       | [[2A Child Questionnaire|2A]]    | 4-12     |
| on how many days per week does your child sit in front of a screen (e.g. television, tablet, telephone, (game) computer, laptop, etc.)?                                                      | op hoeveel dagen per week zit uw kind achter een beeldscherm (denk aan televisie, tablet, telefoon, (spel)computer, laptop, etc.)?                                                                           | screentime_frequency_chi_q_2  | chscreent1a      | [[3A Child Questionnaire|3A]]    | 4-12     |
| watching tv/video/dvds / how many hours a week, on average, did your child spend on this activity when it was between 4 and 7 years old?                                                     | tv/video/dvd-kijken / hoeveel uur per week besteedde uw kind gemiddeld hieraan in de leeftijd van 4 t/m 7 jaar?                                                                                              | television_duration_ch2a_q_1  | ch4_7yactive5a   | [[1A General questionnaire|1A]]  | 13-17    |
| watching tv/video/dvds / how many hours a week, on average, did your child spend on this activity from the age of 8 until the present?                                                       | tv/video/dvd-kijken / hoeveel uur per week besteedde uw kind gemiddeld hieraan in de leeftijd van 8 jaar t/m nu?                                                                                             | television_duration_ch3_q_1   | ch8yactive5a     | [[1A General questionnaire|1A]]  | 8-12     |
| watching tv/video/dvds / how many hours a week, on average, did your child spend on this activity when it was between 8 and 12 years old?                                                    | tv/video/dvd-kijken / hoeveel uur per week besteedde uw kind gemiddeld hieraan in de leeftijd van 8 t/m 12 jaar?                                                                                             | television_duration_ch3a_q_1  | ch8_12yactive5a  | [[1A General questionnaire|1A]]  | 13-17    |
| watching tv/video/dvds / how many hours a week, on average, did your child spend on this activity from the age of 13 until the present?                                                      | tv/video/dvd-kijken / hoeveel uur per week besteedde uw kind gemiddeld hieraan in de leeftijd van 13 jaar t/m nu?                                                                                            | television_duration_ch4_q_1   | ch13yactive5a    | [[1A General questionnaire|1A]]  | 13-17    |
| my child never had one / how old (xx years) was your child when it had its own television for the first time?                                                                                | dat heeft mijn kind nooit gehad / hoe oud (xx jaar) was uw kind toen hij/zij voor het eerst een eigen televisie had?                                                                                         | television_own_chi_q_1_a      | chactive6a1      | [[1A General questionnaire|1A]]  | 13-17    |
| how old (xx years) was your child when it first had its own television?                                                                                                                      | hoe oud (xx jaar) was uw kind toen hij/zij voor het eerst een eigen televisie had?                                                                                                                           | television_own_chi_q_1_b      | chactive6a2      | [[1A General questionnaire|1A]]  | 13-17    |


===Screen use adolescents===
| **Label English**                                                                                                                                                                                            | **Label Dutch**                                                                                                                                                                                                                         | **Code**                         | **Variable**   | **Assessment**                 | **Age**  |
| using the computer / how often did you do this activity in that normal week?                                                                                                                                 | achter de computer zitten / hoe vaak heb je deze activiteit in die normale week gedaan?                                                                                                                                                 | computer_normalweek_ach_q_1      | achactive15    | [[1A Youth Questionnaire|1A]]  | 13-17    |
| using the computer (number of times per week) / how often did you do this activity in that normal week?                                                                                                      | achter de computer zitten (aantal keren per week) / hoe vaak heb je deze activiteit in die normale week gedaan?                                                                                                                         | computer_normalweek_ach_q_1_a    | achactive15a   | [[1A Youth Questionnaire|1A]]  | 13-17    |
| using the computer (xx hours each time) / how often did you do this activity in that normal week?                                                                                                            | achter de computer zitten (xx uur per keer) / hoe vaak heb je deze activiteit in die normale week gedaan?                                                                                                                               | computer_normalweek_ach_q_1_b    | achactive15b   | [[1A Youth Questionnaire|1A]]  | 13-17    |
| using the computer (and xx minutes each time) / how often did you do this activity in that normal week?                                                                                                      | achter de computer zitten (en xx minuten per keer) / hoe vaak heb je deze activiteit in die normale week gedaan?                                                                                                                        | computer_normalweek_ach_q_1_c    | achactive15c   | [[1A Youth Questionnaire|1A]]  | 13-17    |
| on average, how much time per week do you spend on gaming?                                                                                                                                                   | hoeveel tijd besteed je gemiddeld per week aan gamen?                                                                                                                                                                                   | gaming_duration_ach_q_2          | achgame02      | [[3A Youth Questionnaire|3A]]  | 13-17    |
| how often do you play videogames because you feel bad?                                                                                                                                                       | hoe vaak ga je gamen omdat je je rot voelt?                                                                                                                                                                                             | gaming_feelbad_ach_q_8           | achgame08      | [[3A Youth Questionnaire|3A]]  | 13-17    |
| how often do you play videogames?                                                                                                                                                                            | hoe vaak speel je games?                                                                                                                                                                                                                | gaming_frequency_ach_q_1         | achgame01      | [[3A Youth Questionnaire|3A]]  | 13-17    |
| how often do you prefer gaming over spending time with others (for example friends or parents) in real life?                                                                                                 | hoe vaak ga je liever gamen dan dat je in het echt tijd met anderen doorbrengt (bijvoorbeeld vrienden of ouders)?                                                                                                                       | gaming_preference_ach_q_5        | achgame05      | [[3A Youth Questionnaire|3A]]  | 13-17    |
| how often do other people (for example parents or friends) tell you that you should game less?                                                                                                               | hoe vaak zeggen anderen (bijvoorbeeld ouders of vrienden) dat je minder zou moeten gamen?                                                                                                                                               | gaming_reduce_ach_q_4            | achgame04      | [[3A Youth Questionnaire|3A]]  | 13-17    |
| how often do you rush your work or homework because you want to game?                                                                                                                                        | hoe vaak raffel je je werk of huiswerk af omdat je wilt gamen?                                                                                                                                                                          | gaming_rush_ach_q_7              | achgame07      | [[3A Youth Questionnaire|3A]]  | 13-17    |
| how often do you lose sleep due to gaming?                                                                                                                                                                   | hoe vaak kom je slaap te kort door het gamen?                                                                                                                                                                                           | gaming_sleeploss_ach_q_9         | achgame09      | [[3A Youth Questionnaire|3A]]  | 13-17    |
| how often do you find it difficult to stop gaming?                                                                                                                                                           | hoe vaak vind je het moeilijk om met gamen te stoppen?                                                                                                                                                                                  | gaming_stop_ach_q_3              | achgame03      | [[3A Youth Questionnaire|3A]]  | 13-17    |
| how often do you feel restless, stressed, or irritated when you are not able to game?                                                                                                                        | hoe vaak voel je je onrustig, gestrest of geïrriteerd wanneer je niet kunt gamen?                                                                                                                                                       | gaming_stress_ach_q_6            | achgame06      | [[3A Youth Questionnaire|3A]]  | 13-17    |
| chat, whatsapp, ping (exchanging short text messages) / how often per day do you use the following online applications?                                                                                      | chatten, whatsappen, pingen (het uitwisselen van korte tekstberichten) / hoe vaak per dag gebruik je de volgende online toepassingen?                                                                                                   | internet_chat_ach_q_1            | achinternet1a  | [[2A Youth Questionnaire|2A]]  | 13-17    |
| online gambling (e.g. poker) / on average, how much time do you spend per week on the following online activities?                                                                                           | online gokken (bijv. pokeren) / hoeveel tijd besteed je gemiddeld per week aan de volgende online activiteiten?                                                                                                                         | internet_gambling_ach_q_1        | achinternet2c  | [[2A Youth Questionnaire|2A]]  | 13-17    |
| playing games with other online users (e.g. wow, lol, call of duty) (this does not include small-scale games) / on average, how much time do you spend per week on the following online activities?          | het spelen van games met andere online gebruikers (bijv. wow, lol, call of duty) / hoeveel tijd besteed je gemiddeld per week aan de volgende online activiteiten?                                                                      | internet_gaming_ach_q_1          | achinternet2a  | [[2A Youth Questionnaire|2A]]  | 13-17    |
| search engines and information sites (e.g. google, wikipedia, nunl, weeronline) / how often per day do you use the following online applications?                                                            | zoekmachines en informatiesites (bijv. google, wikipedia, nunl, weeronline) / hoe vaak per dag gebruik je de volgende online toepassingen?                                                                                              | internet_search_ach_q_1          | achinternet1c  | [[2A Youth Questionnaire|2A]]  | 13-17    |
| online shopping (e.g. marktplaats, ebay, webshops) / on average, how much time do you spend per week on the following online activities?                                                                     | online shoppen (bijv. marktplaats, webshops) / hoeveel tijd besteed je gemiddeld per week aan de volgende online activiteiten?                                                                                                          | internet_shopping_ach_q_1        | achinternet2b  | [[2A Youth Questionnaire|2A]]  | 13-17    |
| small games (e.g. spele.nl or other small online action games or puzzles) / how often per day do you use the following online applications?                                                                  | kleine spelletjes (bijv. spele.nl of andere kleine online actie- of puzzelspelletjes) / hoe vaak per dag gebruik je de volgende online toepassingen?                                                                                    | internet_smallgames_ach_q_1      | achinternet1d  | [[2A Youth Questionnaire|2A]]  | 13-17    |
| profile sites and social network sites (e.g. facebook, twitter, instagram, google+) / how often per day do you use the following online applications?                                                        | profielsites en sociale netwerksites (bijv. facebook, twitter, instagram, google+) / hoe vaak per dag gebruik je de volgende online toepassingen?                                                                                       | internet_socialnetworks_ach_q_1  | achinternet1b  | [[2A Youth Questionnaire|2A]]  | 13-17    |
| use youtube or other video sites / on average, how much time do you spend per week on the following online activities?                                                                                       | youtube of andere sites met filmpjes gebruiken / hoeveel tijd besteed je gemiddeld per week aan de volgende online activiteiten?                                                                                                        | internet_video_ach_q_1           | achinternet2d  | [[2A Youth Questionnaire|2A]]  | 13-17    |
| do you have a mobile phone?                                                                                                                                                                                  | heb je een mobiele telefoon?                                                                                                                                                                                                            | mob_mobilephone_ach_q_01         | achmob1        | [[2A youth questionnaire|2A]]  | 13-17    |
| can you use that telephone to access the internet? / do you have a mobile phone?                                                                                                                             | is dat een telefoon waarmee je op het internet kunt? / heb je een mobiele telefoon?                                                                                                                                                     | mob_mobilephone_ach_q_01_a       | achmob1a       | [[2A youth questionnaire|2A]]  | 13-17    |
| using the internet (e.g. e-mailing, chatting, gaming for yourself and not for work or school) / how often did you do this activity in that normal week?                                                      | op internet zitten (bijv. e-mailen, chatten, gamen voor jezelf, dus niet voor opleiding/werk) / hoe vaak heb je deze activiteit in die normale week gedaan?                                                                             | online_normalweek_ach_q_1        | achactive16    | [[1A Youth Questionnaire|1A]]  | 13-17    |
| using the internet (number of times per week) / how often did you do this activity in that normal week?                                                                                                      | op internet zitten (aantal keren per week) / hoe vaak heb je deze activiteit in die normale week gedaan?                                                                                                                                | online_normalweek_ach_q_1_a      | achactive16a   | [[1A Youth Questionnaire|1A]]  | 13-17    |
| using the internet (xx hours each time) / how often did you do this activity in that normal week?                                                                                                            | op internet zitten (xx uur per keer) / hoe vaak heb je deze activiteit in die normale week gedaan?                                                                                                                                      | online_normalweek_ach_q_1_b      | achactive16b   | [[1A Youth Questionnaire|1A]]  | 13-17    |
| using the internet (and xx minutes each time) / how often did you do this activity in that normal week?                                                                                                      | op internet zitten (en xx minuten per keer) / hoe vaak heb je deze activiteit in die normale week gedaan?                                                                                                                               | online_normalweek_ach_q_1_c      | achactive16c   | [[1A Youth Questionnaire|1A]]  | 13-17    |
| on the days that you sit in front of a screen, how many hours on average is that? this includes television, tablet, (game) computer, laptop, etc, screens                                                    | op de dagen dat je achter een beeldscherm zit, hoeveel uur zit je dan gemiddeld achter een beeldscherm?                                                                                                                                 | screentime_duration_ach_q_1      | achscreent2    | [[2A Youth Questionnaire|2A]]  | 13-17    |
| on the days that you sit in front of a screen for school and/or (home)work, how many hours on average is that? this includes television, tablet, (game) computer, laptop, telephone, etc)                    | op de dagen dat je achter een beeldscherm zit voor school en/of (huis)werk, hoeveel uur zit je dan gemiddeld achter een beeldscherm? tel de tijd achter televisie, tablet (spel)computer, laptop, telefoon, etc. bij elkaar op.         | screentime_duration_ach_q_1_a    | achscreent2a   | [[3A Youth Questionnaire|3A]]  | 13-17    |
| on the days that you sit in front of a screen for things other than school and/or (home)work, how many hours on average is that? this includes television, tablet, (game) computer, laptop, telephone, etc)  | op de dagen dat je achter een beeldscherm zit wat niet voor school en/of werk is, hoeveel uur zit je dan gemiddeld achter een beeldscherm? tel de tijd achter televisie, tablet, (spel)computer, laptop, telefoon, etc. bij elkaar op.  | screentime_duration_ach_q_1_b    | achscreent2b   | [[3A Youth Questionnaire|3A]]  | 13-17    |
| on how many days per week do you sit in front of a screen (eg, television, tablet, (gaming) computer, laptop, etc)?                                                                                          | op hoeveel dagen per week zit je achter een beeldscherm (denk aan televisie, tablet, (spel)computer, laptop, etc)?                                                                                                                      | screentime_frequency_ach_q_1     | achscreent1    | [[2A Youth Questionnaire|2A]]  | 13-17    |
| on how many days per week do you sit in front of a screen for school and/or (home)work?                                                                                                                      | op hoeveel dagen per week zit je achter een beeldscherm voor school en/of (huis)werk?                                                                                                                                                   | screentime_frequency_ach_q_1_a   | achscreent1a   | [[3A Youth Questionnaire|3A]]  | 13-17    |
| on how many days per week do you sit in front of a screen for things other than school and/or (home)work?                                                                                                    | op hoeveel dagen per week zit je achter een beeldscherm wat niet voor school en/of (huis)werk is?                                                                                                                                       | screentime_frequency_ach_q_1_b   | achscreent1b   | [[3A Youth Questionnaire|3A]]  | 13-17    |
| on average, how much time per day do you spend on social media?                                                                                                                                              | hoeveel tijd besteed je gemiddeld per dag aan social media?                                                                                                                                                                             | socialmedia_duration_ach_q_1     | achsocm02      | [[3A Youth Questionnaire|3A]]  | 13-17    |
| how often do you use social media because you feel bad?                                                                                                                                                      | hoe vaak ga je social media gebruiken omdat je je rot voelt?                                                                                                                                                                            | socialmedia_feelbad_ach_q_1      | achsocm08      | [[3A Youth Questionnaire|3A]]  | 13-17    |
| how often per day do you use social media (for example instragram, whatsapp, snapchat, facebook en youtube)?                                                                                                 | hoe vaak per dag gebruik je social media (bijvoorbeeld instagram, whatsapp, snapchat, facebook en youtube)?                                                                                                                             | socialmedia_frequency_ach_q_1    | achsocm01      | [[3A Youth Questionnaire|3A]]  | 13-17    |
| how often do you prefer using social media over spending time with others (for example friends or parents) in real life?                                                                                     | hoe vaak gebruik je liever social media dan dat je in het echt tijd met anderen doorbrengt (bijvoorbeeld vrienden of ouders)?                                                                                                           | socialmedia_preference_ach_q_1   | achsocm05      | [[3A Youth Questionnaire|3A]]  | 13-17    |
| how often do other people (for example parents or friends) tell you that you should spend less time on social media?                                                                                         | hoe vaak zeggen anderen (bijvoorbeeld ouders of vrienden) dat je minder tijd zou moeten besteden aan social media?                                                                                                                      | socialmedia_reduce_ach_q_1       | achsocm04      | [[3A Youth Questionnaire|3A]]  | 13-17    |
| how often do you rush your homework because you want to use social media?                                                                                                                                    | hoe vaak raffel je je huiswerk af om social media te gebruiken?                                                                                                                                                                         | socialmedia_rush_ach_q_1         | achsocm07      | [[3A Youth Questionnaire|3A]]  | 13-17    |
| how often do you lose sleep due to social media?                                                                                                                                                             | hoe vaak kom je slaap te kort door social media?                                                                                                                                                                                        | socialmedia_sleeploss_ach_q_1    | achsocm09      | [[3A Youth Questionnaire|3A]]  | 13-17    |
| how often do you find it difficult to stop with social media?                                                                                                                                                | hoe vaak vind je het moeilijk om met social media te stoppen?                                                                                                                                                                           | socialmedia_stop_ach_q_1         | achsocm03      | [[3A Youth Questionnaire|3A]]  | 13-17    |
| how often do you feel restless, stressed, or irritated when you are not able to use social media?                                                                                                            | hoe vaak voel je je onrustig, gestrest of geïrriteerd wanneer je geen social media kunt gebruiken?                                                                                                                                      | socialmedia_stress_ach_q_1       | achsocm06      | [[3A Youth Questionnaire|3A]]  | 13-17    |
| watching television or a video/dvd / how often did you do this activity in that normal week?                                                                                                                 | televisie of video/dvd kijken / hoe vaak heb je deze activiteit in die normale week gedaan?                                                                                                                                             | television_normalweek_ach_q_1    | achactive17    | [[1A Youth Questionnaire|1A]]  | 13-17    |
| watching television (number of times per week) / how often did you do this activity in that normal week?                                                                                                     | televisie kijken (aantal keren per week) / hoe vaak heb je deze activiteit in die normale week gedaan?                                                                                                                                  | television_normalweek_ach_q_1_a  | achactive17a   | [[1A Youth Questionnaire|1A]]  | 13-17    |
| watching television (xx hours each time) / how often did you do this activity in that normal week?                                                                                                           | televisie kijken (xx uur per keer) / hoe vaak heb je deze activiteit in die normale week gedaan?                                                                                                                                        | television_normalweek_ach_q_1_b  | achactive17b   | [[1A Youth Questionnaire|1A]]  | 13-17    |
| watching television (and xx minutes each time) / how often did you do this activity in that normal week?                                                                                                     | televisie kijken (en xx minuten per keer) / hoe vaak heb je deze activiteit in die normale week gedaan?                                                                                                                                 | television_normalweek_ach_q_1_c  | achactive17c   | [[1A Youth Questionnaire|1A]]  | 13-17    |

===Screen use children in BLUQ===
| **Label English**                                                                                                                                                      | **Label Dutch**                                                                                                                                                              | **Code**                             | **Variable**    | **Assessment**  | **Age**  |
| on how many days a week did your child use a pc/laptop in the hour before going to sleep? (in the last 4 weeks)                                                        | hoeveel dagen per week gebruikte uw kind gemiddeld een pc/laptop in het uur voor het slapen gaan? (in de afgelopen 4 weken)                                                  | beforesleep_computer_chi_q_1         | chscreen5a      | [[BLUQ]]        | 8-12     |
| watching movies/clips/television/netflix / what does your child do on the pc/laptop at that moment? (hour before sleep)                                                | film(pjes)/tv/netflix kijken / wat doet uw kind dan op de pc/laptop? (uur voor slapen)                                                                                       | beforesleep_computer_chi_q_1_a1      | chscreen5b1     | [[BLUQ]]        | 8-12     |
| playing games (for example via pc, app, or website) / what does your child do on the pc/laptop at that moment? (hour before sleep)                                     | spelletjes spelen (bijvoorbeeld via pc, app of website) / wat doet uw kind dan op de pc/laptop? (uur voor slapen)                                                            | beforesleep_computer_chi_q_1_a2      | chscreen5b2     | [[BLUQ]]        | 8-12     |
| surfing the web / what does your child do on the pc/laptop at that moment? (hour before sleep)                                                                         | websites bezoeken / wat doet uw kind dan op de pc/laptop? (uur voor slapen)                                                                                                  | beforesleep_computer_chi_q_1_a3      | chscreen5b3     | [[BLUQ]]        | 8-12     |
| e-mailing, using whatsapp (or use of another chat programme) / what does your child do on the pc/laptop at that moment? (hour before sleep)                            | e-mailen, whatsapp gebruiken (of gebruik ander chatprogramma) / wat doet uw kind dan op de pc/laptop? (uur voor slapen)                                                      | beforesleep_computer_chi_q_1_a4      | chscreen5b4     | [[BLUQ]]        | 8-12     |
| using social media (facebook, twitter, etc.) / what does your child do on the pc/laptop at that moment? (hour before sleep)                                            | social media gebruiken (facebook, twitter etc.) / wat doet uw kind dan op de pc/laptop? (uur voor slapen)                                                                    | beforesleep_computer_chi_q_1_a5      | chscreen5b5     | [[BLUQ]]        | 8-12     |
| reading an e-book or pdf / what does your child do on the pc/laptop at that moment? (hour before sleep)                                                                | e-book/pdf lezen / wat doet uw kind dan op de pc/laptop? (uur voor slapen)                                                                                                   | beforesleep_computer_chi_q_1_a6      | chscreen5b6     | [[BLUQ]]        | 8-12     |
| processing text or data (word, excel, etc.) / what does your child do on the pc/laptop at that moment? (hour before sleep)                                             | tekst/data-verwerking (word, excel etc.) / wat doet uw kind dan op de pc/laptop? (uur voor slapen)                                                                           | beforesleep_computer_chi_q_1_a7      | chscreen5b7     | [[BLUQ]]        | 8-12     |
| i don't know / what does your child do on the pc/laptop at that moment? (hour before sleep)                                                                            | weet ik niet / wat doet uw kind dan op de pc/laptop? (uur voor slapen)                                                                                                       | beforesleep_computer_chi_q_1_a8      | chscreen5b8     | [[BLUQ]]        | 8-12     |
| other activity: / what does your child do on the pc/laptop at that moment? (hour before sleep)                                                                         | anders, nl. / wat doet uw kind dan op de pc/laptop? (uur voor slapen)                                                                                                        | beforesleep_computer_chi_q_1_a9      | chscreen5b9     | [[BLUQ]]        | 8-12     |
| specification other activity / what does your child do on the pc/laptop at that moment? (hour before sleep)                                                            | specificatie anders, nl. / wat doet uw kind dan op de pc/laptop? (uur voor slapen)                                                                                           | beforesleep_computer_chi_q_1_a9a     | chscreen5b9txt  | [[BLUQ]]        | 8-12     |
| on how many days a week did your child use a smartphone in the hour before going to sleep? (in the last 4 weeks)                                                       | hoeveel dagen per week gebruikte uw kind gemiddeld een smartphone in het uur voor het slapen gaan? (in de afgelopen 4 weken)                                                 | beforesleep_smartphone_chi_q_1       | chscreen6a      | [[BLUQ]]        | 8-12     |
| watching movies/clips/television/netflix / what does your child do on the smartphone at that moment? (hour before sleep)                                               | film(pjes)/tv/netflix kijken / wat doet uw kind dan op de smartphone? (uur voor slapen)                                                                                      | beforesleep_smartphone_chi_q_1_a1    | chscreen6b1     | [[BLUQ]]        | 8-12     |
| playing games (for example via app or website) / what does your child do on the smartphone at that moment? (hour before sleep)                                         | spelletjes spelen (bijvoorbeeld via app of website) / wat doet uw kind dan op de smartphone? (uur voor slapen)                                                               | beforesleep_smartphone_chi_q_1_a2    | chscreen6b2     | [[BLUQ]]        | 8-12     |
| surfing the web / what does your child do on the smartphone at that moment? (hour before sleep)                                                                        | websites bezoeken / wat doet uw kind dan op de smartphone? (uur voor slapen)                                                                                                 | beforesleep_smartphone_chi_q_1_a3    | chscreen6b3     | [[BLUQ]]        | 8-12     |
| e-mailing, using whatsapp (or use of another chat programme) / what does your child do on the smartphone at that moment? (hour before sleep)                           | e-mailen, whatsapp gebruiken (of gebruik ander chatprogramma) / wat doet uw kind dan op de smartphone? (uur voor slapen)                                                     | beforesleep_smartphone_chi_q_1_a4    | chscreen6b4     | [[BLUQ]]        | 8-12     |
| using social media (facebook, twitter, etc.) / what does your child do on the smartphone at that moment? (hour before sleep)                                           | social media gebruiken (facebook, twitter etc.) / wat doet uw kind dan op de smartphone? (uur voor slapen)                                                                   | beforesleep_smartphone_chi_q_1_a5    | chscreen6b5     | [[BLUQ]]        | 8-12     |
| reading an e-book or pdf / what does your child do on the smartphone at that moment? (hour before sleep)                                                               | e-book/pdf lezen / wat doet uw kind dan op de smartphone? (uur voor slapen)                                                                                                  | beforesleep_smartphone_chi_q_1_a6    | chscreen6b6     | [[BLUQ]]        | 8-12     |
| processing text or data (word, excel, etc.) / what does your child do on the smartphone at that moment? (hour before sleep)                                            | tekst/data-verwerking (word, excel etc.) / wat doet uw kind dan op de smartphone? (uur voor slapen)                                                                          | beforesleep_smartphone_chi_q_1_a7    | chscreen6b7     | [[BLUQ]]        | 8-12     |
| i don't know / what does your child do on the smartphone at that moment? (hour before sleep)                                                                           | weet ik niet / wat doet uw kind dan op de smartphone? (uur voor slapen)                                                                                                      | beforesleep_smartphone_chi_q_1_a8    | chscreen6b8     | [[BLUQ]]        | 8-12     |
| other activity: / what does your child do on the smartphone at that moment? (hour before sleep)                                                                        | anders, nl. / wat doet uw kind dan op de smartphone? (uur voor slapen)                                                                                                       | beforesleep_smartphone_chi_q_1_a9    | chscreen6b9     | [[BLUQ]]        | 8-12     |
| specification other activity / what does your child do on the smartphone at that moment? (hour before sleep)                                                           | specificatie anders, nl. / wat doet uw kind dan op de smartphone? (uur voor slapen)                                                                                          | beforesleep_smartphone_chi_q_1_a9a   | chscreen6b9txt  | [[BLUQ]]        | 8-12     |
| on how many days a week did your child use a tablet (ipad or other brand) in the hour before going to sleep? (in the last 4 weeks)                                     | hoeveel dagen per week gebruikte uw kind gemiddeld een tablet (ipad of ander merk) in het uur voor het slapen gaan? (in de afgelopen 4 weken)                                | beforesleep_tablet_chi_q_1           | chscreen7a      | [[BLUQ]]        | 8-12     |
| watching movies/clips/television/netflix / what does your child do on the tablet at that moment? (hour before sleep)                                                   | film(pjes)/tv/netflix kijken / wat doet uw kind dan op de tablet? (uur voor slapen)                                                                                          | beforesleep_tablet_chi_q_1_a1        | chscreen7b1     | [[BLUQ]]        | 8-12     |
| playing games (for example via app or website) / what does your child do on the tablet at that moment? (hour before sleep)                                             | spelletjes spelen (bijvoorbeeld via app of website) / wat doet uw kind dan op de tablet? (uur voor slapen)                                                                   | beforesleep_tablet_chi_q_1_a2        | chscreen7b2     | [[BLUQ]]        | 8-12     |
| surfing the web / what does your child do on the tablet at that moment? (hour before sleep)                                                                            | websites bezoeken / wat doet uw kind dan op de tablet? (uur voor slapen)                                                                                                     | beforesleep_tablet_chi_q_1_a3        | chscreen7b3     | [[BLUQ]]        | 8-12     |
| e-mailing, using whatsapp (or use of another chat programme) / what does your child do on the tablet at that moment? (hour before sleep)                               | e-mailen, whatsapp gebruiken (of gebruik ander chatprogramma) / wat doet uw kind dan op de tablet? (uur voor slapen)                                                         | beforesleep_tablet_chi_q_1_a4        | chscreen7b4     | [[BLUQ]]        | 8-12     |
| using social media (facebook, twitter, etc.) / what does your child do on the tablet at that moment? (hour before sleep)                                               | social media gebruiken (facebook, twitter etc.) / wat doet uw kind dan op de tablet? (uur voor slapen)                                                                       | beforesleep_tablet_chi_q_1_a5        | chscreen7b5     | [[BLUQ]]        | 8-12     |
| reading an e-book or pdf / what does your child do on the tablet at that moment? (hour before sleep)                                                                   | e-book/pdf lezen / wat doet uw kind dan op de tablet? (uur voor slapen)                                                                                                      | beforesleep_tablet_chi_q_1_a6        | chscreen7b6     | [[BLUQ]]        | 8-12     |
| processing text or data (word, excel, etc.) / what does your child do on the tablet at that moment? (hour before sleep)                                                | tekst/data-verwerking (word, excel etc.) / wat doet uw kind dan op de tablet? (uur voor slapen)                                                                              | beforesleep_tablet_chi_q_1_a7        | chscreen7b7     | [[BLUQ]]        | 8-12     |
| i don't know / what does your child do on the tablet at that moment? (hour before sleep)                                                                               | weet ik niet / wat doet uw kind dan op de tablet? (uur voor slapen)                                                                                                          | beforesleep_tablet_chi_q_1_a8        | chscreen7b8     | [[BLUQ]]        | 8-12     |
| other activity: / what does your child do on the tablet at that moment? (hour before sleep)                                                                            | anders, nl. / wat doet uw kind dan op de tablet? (uur voor slapen)                                                                                                           | beforesleep_tablet_chi_q_1_a9        | chscreen7b9     | [[BLUQ]]        | 8-12     |
| specification other activity / what does your child do on the tablet at that moment? (hour before sleep)                                                               | specificatie anders, nl. / wat doet uw kind dan op de tablet? (uur voor slapen)                                                                                              | beforesleep_tablet_chi_q_1_a9a       | chscreen7b9txt  | [[BLUQ]]        | 8-12     |
| on how many days a week did your child use a tv in the hour before going to sleep? (in the last 4 weeks)                                                               | hoeveel dagen per week gebruikte uw kind gemiddeld een televisie in het uur voor het slapen gaan? (in de afgelopen 4 weken)                                                  | beforesleep_television_chi_q_1       | chscreen8a      | [[BLUQ]]        | 8-12     |
| watching movies/clips/television/netflix / what does your child do on the tv at that moment? (hour before sleep)                                                       | film(pjes)/tv/netflix kijken / wat doet uw kind dan op de televisie? (uur voor slapen)                                                                                       | beforesleep_television_chi_q_1_a1    | chscreen8b1     | [[BLUQ]]        | 8-12     |
| playing games (for example via game console, pc, or app) / what does your child do on the tv at that moment? (hour before sleep)                                       | spelletjes spelen (bijvoorbeeld via gameconsole, pc of app) / wat doet uw kind dan op de televisie? (uur voor slapen)                                                        | beforesleep_television_chi_q_1_a2    | chscreen8b2     | [[BLUQ]]        | 8-12     |
| surfing the web / what does your child do on the tv at that moment? (hour before sleep)                                                                                | websites bezoeken / wat doet uw kind dan op de televisie? (uur voor slapen)                                                                                                  | beforesleep_television_chi_q_1_a3    | chscreen8b3     | [[BLUQ]]        | 8-12     |
| e-mailing, using whatsapp (or use of another chat programme) / what does your child do on the tv at that moment? (hour before sleep)                                   | e-mailen, whatsapp gebruiken (of gebruik ander chatprogramma) / wat doet uw kind dan op de televisie? (uur voor slapen)                                                      | beforesleep_television_chi_q_1_a4    | chscreen8b4     | [[BLUQ]]        | 8-12     |
| using social media (facebook, twitter, etc.) / what does your child do on the tv at that moment? (hour before sleep)                                                   | social media gebruiken (facebook, twitter etc.) / wat doet uw kind dan op de televisie? (uur voor slapen)                                                                    | beforesleep_television_chi_q_1_a5    | chscreen8b5     | [[BLUQ]]        | 8-12     |
| reading an e-book or pdf / what does your child do on the tv at that moment? (hour before sleep)                                                                       | e-book/pdf lezen / wat doet uw kind dan op de televisie? (uur voor slapen)                                                                                                   | beforesleep_television_chi_q_1_a6    | chscreen8b6     | [[BLUQ]]        | 8-12     |
| processing text or data (word, excel, etc.) / what does your child do on the tv at that moment? (hour before sleep)                                                    | tekst/data-verwerking (word, excel etc.) / wat doet uw kind dan op de televisie? (uur voor slapen)                                                                           | beforesleep_television_chi_q_1_a7    | chscreen8b7     | [[BLUQ]]        | 8-12     |
| i don't know / what does your child do on the tv at that moment? (hour before sleep)                                                                                   | weet ik niet / wat doet uw kind dan op de televisie? (uur voor slapen)                                                                                                       | beforesleep_television_chi_q_1_a8    | chscreen8b8     | [[BLUQ]]        | 8-12     |
| other activity: / what does your child do on the tv at that moment? (hour before sleep)                                                                                | anders, nl. / wat doet uw kind dan op de televisie? (uur voor slapen)                                                                                                        | beforesleep_television_chi_q_1_a9    | chscreen8b9     | [[BLUQ]]        | 8-12     |
| specification other activity / what does your child do on the tv at that moment? (hour before sleep)                                                                   | specificatie anders, nl. / wat doet uw kind dan op de televisie? (uur voor slapen)                                                                                           | beforesleep_television_chi_q_1_a9a   | chscreen8b9txt  | [[BLUQ]]        | 8-12     |
| pc/laptop / on which devices did your child regularly (more than 1x per week) use programmes or apps to filter blue light during the evening/night?                    | pc/laptop / op welke apparaten gebruikte uw kind regelmatig (meer dan 1x per week) programma's of apps om blauw licht te filteren tijdens de avond/nacht?                    | bluelight_filter_chi_q_1_a           | chscreen9a      | [[BLUQ]]        | 8-12     |
| smartphone / on which devices did your child regularly (more than 1x per week) use programmes or apps to filter blue light during the evening/night?                   | smartphone / op welke apparaten gebruikte uw kind regelmatig (meer dan 1x per week) programma's of apps om blauw licht te filteren tijdens de avond/nacht?                   | bluelight_filter_chi_q_1_b           | chscreen9b      | [[BLUQ]]        | 8-12     |
| tablet (ipad or other brand)/ on which devices did your child regularly (more than 1x per week) use programmes or apps to filter blue light during the evening/night?  | tablet (ipad of ander merk) / op welke apparaten gebruikte uw kind regelmatig (meer dan 1x per week) programma's of apps om blauw licht te filteren tijdens de avond/nacht?  | bluelight_filter_chi_q_1_c           | chscreen9c      | [[BLUQ]]        | 8-12     |
| tv / on which devices did your child regularly (more than 1x per week) use programmes or apps to filter blue light during the evening/night?                           | tv / op welke apparaten gebruikte uw kind regelmatig (meer dan 1x per week) programma's of apps om blauw licht te filteren tijdens de avond/nacht?                           | bluelight_filter_chi_q_1_d           | chscreen9d      | [[BLUQ]]        | 8-12     |
| none of the devices / on which devices did your child regularly (more than 1x per week) use programmes or apps to filter blue light during the evening/night?          | geen van de apparaten / op welke apparaten gebruikte uw kind regelmatig (meer dan 1x per week) programma's of apps om blauw licht te filteren tijdens de avond/nacht?        | bluelight_filter_chi_q_1_e           | chscreen9e      | [[BLUQ]]        | 8-12     |
| how often did your child manually adjust the light intensity (brightness) of the pc/laptop (or did you or another family member do this for your child)?               | hoe vaak paste uw kind de lichtinstellingen van de pc/laptop handmatig aan? (of deed u of een ander gezindslid dit voor uw kind)?                                            | brightness_computer_chi_q_1          | chscreen1d      | [[BLUQ]]        | 8-12     |
| how often did your child manually adjust the light intensity (brightness) of the smartphone (or did you or another family member do this for your child)?              | hoe vaak paste uw kind de lichtinstellingen van de smartphone handmatig aan (of deed u of een ander gezinslid dit voor uw kind)?                                             | brightness_smartphone_chi_q_1        | chscreen2d      | [[BLUQ]]        | 8-12     |
| how often did your child manually adjust the light intensity (brightness) of the tablet (or did you or another family member do this for your child)?                  | hoe vaak paste uw kind de lichtinstellingen van de tablet handmatig aan (of deed u of een ander gezinslid dit voor uw kind)?                                                 | brightness_tablet_chi_q_1            | chscreen3d      | [[BLUQ]]        | 8-12     |
| how often did your child manually adjust the light intensity (brightness) of the tv (or did you or another family member do this for your child)?                      | hoe vaak paste uw kind de lichtinstellingen van de televisie handmatig aan (of deed u of een ander gezinslid dit voor uw kind)?                                              | brightness_television_chi_q_1        | chscreen4d      | [[BLUQ]]        | 8-12     |
| on average, how many days a week did your child use a pc/laptop between 19.00h and 06.00h? (in the last 4 weeks)                                                       | hoeveel dagen per week gebruikte uw kind gemiddeld een pc/laptop in de avond/nacht tussen 19.00 en 06.00 uur? (in de afgelopen 4 weken)                                      | eveningnight_computer_chi_q_1        | chscreen1a      | [[BLUQ]]        | 8-12     |
| on average, how many hours did your child use a pc/laptop between 19.00h and 06.00h? (in the last 4 weeks)                                                             | hoeveel uur besteedde uw kind dan gemiddeld tussen 19.00 en 06.00 uur aan het gebruik van een pc/laptop? (in de afgelopen 4 weken)                                           | eveningnight_computer_chi_q_1_a      | chscreen1b      | [[BLUQ]]        | 8-12     |
| watching movies/clips/television/netflix / what does your child do on the pc/laptop at that moment? (evening/night)                                                    | film(pjes)/tv/netflix kijken / wat doet uw kind dan op de pc/laptop? (avond/nacht)                                                                                           | eveningnight_computer_chi_q_1_b1     | chscreen1c1     | [[BLUQ]]        | 8-12     |
| playing games (for example via pc, app, or website) / what does your child do on the pc/laptop at that moment? (evening/night)                                         | spelletjes spelen (bijvoorbeeld via pc, app of website) / wat doet uw kind dan op de pc/laptop? (avond/nacht)                                                                | eveningnight_computer_chi_q_1_b2     | chscreen1c2     | [[BLUQ]]        | 8-12     |
| surfing the web / what does your child do on the pc/laptop at that moment? (evening/night)                                                                             | websites bezoeken / wat doet uw kind dan op de pc/laptop? (avond/nacht)                                                                                                      | eveningnight_computer_chi_q_1_b3     | chscreen1c3     | [[BLUQ]]        | 8-12     |
| e-mailing, using whatsapp (or use of another chat programme) / what does your child do on the pc/laptop at that moment? (evening/night)                                | e-mailen, whatsapp gebruiken (of gebruik ander chatprogramma) / wat doet uw kind dan op de pc/laptop? (avond/nacht)                                                          | eveningnight_computer_chi_q_1_b4     | chscreen1c4     | [[BLUQ]]        | 8-12     |
| using social media (facebook, twitter, etc.) / what does your child do on the pc/laptop at that moment? (evening/night)                                                | social media gebruiken (facebook, twitter etc.) / wat doet uw kind dan op de pc/laptop? (avond/nacht)                                                                        | eveningnight_computer_chi_q_1_b5     | chscreen1c5     | [[BLUQ]]        | 8-12     |
| reading an e-book or pdf / what does your child do on the pc/laptop at that moment? (evening/night)                                                                    | e-book/pdf lezen / wat doet uw kind dan op de pc/laptop? (avond/nacht)                                                                                                       | eveningnight_computer_chi_q_1_b6     | chscreen1c6     | [[BLUQ]]        | 8-12     |
| processing text or data (word, excel, etc.) / what does your child do on the pc/laptop at that moment? (evening/night)                                                 | tekst/data-verwerking (word, excel etc.) / wat doet uw kind dan op de pc/laptop? (avond/nacht)                                                                               | eveningnight_computer_chi_q_1_b7     | chscreen1c7     | [[BLUQ]]        | 8-12     |
| i don't know / what does your child do on the pc/laptop at that moment? (evening/night)                                                                                | weet ik niet / wat doet uw kind dan op de pc/laptop? (avond/nacht)                                                                                                           | eveningnight_computer_chi_q_1_b8     | chscreen1c8     | [[BLUQ]]        | 8-12     |
| other activity: / what does your child do on the pc/laptop at that moment? (evening/night)                                                                             | anders, nl. / wat doet uw kind dan op de pc/laptop? (avond/nacht)                                                                                                            | eveningnight_computer_chi_q_1_b9     | chscreen1c9     | [[BLUQ]]        | 8-12     |
| specification other activity / what does your child do on the pc/laptop at that moment? (evening/night)                                                                | specificatie anders, nl. / wat doet uw kind dan op de pc/laptop? (avond/nacht)                                                                                               | eveningnight_computer_chi_q_1_b9a    | chscreen1c9txt  | [[BLUQ]]        | 8-12     |
| on average, how many days a week did your child use a smartphone between 19.00h and 06.00h? (in the last 4 weeks)                                                      | hoeveel dagen per week gebruikte uw kind gemiddeld een smartphone in de avond/nacht tussen 19.00 en 06.00 uur? (in de afgelopen 4 weken)                                     | eveningnight_smartphone_chi_q_1      | chscreen2a      | [[BLUQ]]        | 8-12     |
| on average, how many hours did your child use a smartphone between 19.00h and 06.00h? (in the last 4 weeks)                                                            | hoeveel uur besteedde uw kind dan gemiddeld tussen 19.00 en 06.00 uur aan het gebruik van een smartphone? (in de afgelopen 4 weken)                                          | eveningnight_smartphone_chi_q_1_a    | chscreen2b      | [[BLUQ]]        | 8-12     |
| watching movies/clips/television/netflix / what does your child do on the smartphone at that moment? (evening/night)                                                   | film(pjes)/tv/netflix kijken / wat doet uw kind dan op de smartphone? (avond/nacht)                                                                                          | eveningnight_smartphone_chi_q_1_b1   | chscreen2c1     | [[BLUQ]]        | 8-12     |
| playing games (for example via app or website) / what does your child do on the smartphone at that moment? (evening/night)                                             | spelletjes spelen (bijvoorbeeld via app of website) / wat doet uw kind dan op de smartphone? (avond/nacht)                                                                   | eveningnight_smartphone_chi_q_1_b2   | chscreen2c2     | [[BLUQ]]        | 8-12     |
| surfing the web / what does your child do on the smartphone at that moment? (evening/night)                                                                            | websites bezoeken / wat doet uw kind dan op de smartphone? (avond/nacht)                                                                                                     | eveningnight_smartphone_chi_q_1_b3   | chscreen2c3     | [[BLUQ]]        | 8-12     |
| e-mailing, using whatsapp (or use of another chat programme) / what does your child do on the smartphone at that moment? (evening/night)                               | e-mailen, whatsapp gebruiken (of gebruik ander chatprogramma) / wat doet uw kind dan op de smartphone? (avond/nacht)                                                         | eveningnight_smartphone_chi_q_1_b4   | chscreen2c4     | [[BLUQ]]        | 8-12     |
| using social media (facebook, twitter, etc.) / what does your child do on the smartphone at that moment? (evening/night)                                               | social media gebruiken (facebook, twitter etc.) / wat doet uw kind dan op de smartphone? (avond/nacht)                                                                       | eveningnight_smartphone_chi_q_1_b5   | chscreen2c5     | [[BLUQ]]        | 8-12     |
| reading an e-book or pdf / what does your child do on the smartphone at that moment? (evening/night)                                                                   | e-book/pdf lezen / wat doet uw kind dan op de smartphone? (avond/nacht)                                                                                                      | eveningnight_smartphone_chi_q_1_b6   | chscreen2c6     | [[BLUQ]]        | 8-12     |
| processing text or data (word, excel, etc.) / what does your child do on the smartphone at that moment? (evening/night)                                                | tekst/data-verwerking (word, excel etc.) / wat doet uw kind dan op de smartphone? (avond/nacht)                                                                              | eveningnight_smartphone_chi_q_1_b7   | chscreen2c7     | [[BLUQ]]        | 8-12     |
| i don't know / what does your child do on the smartphone at that moment? (evening/night)                                                                               | weet ik niet / wat doet uw kind dan op de smartphone? (avond/nacht)                                                                                                          | eveningnight_smartphone_chi_q_1_b8   | chscreen2c8     | [[BLUQ]]        | 8-12     |
| other activity: / what does your child do on the smartphone at that moment? (evening/night)                                                                            | anders, nl. / wat doet uw kind dan op de smartphone? (avond/nacht)                                                                                                           | eveningnight_smartphone_chi_q_1_b9   | chscreen2c9     | [[BLUQ]]        | 8-12     |
| specification other activity / what does your child do on the smartphone at that moment? (evening/night)                                                               | specificatie anders, nl. / wat doet uw kind dan op de smartphone? (avond/nacht)                                                                                              | eveningnight_smartphone_chi_q_1_b9a  | chscreen2c9txt  | [[BLUQ]]        | 8-12     |
| on average, how many days a week did your child use a tablet (ipad or other brand) between 19.00h and 06.00h? (in the last 4 weeks)                                    | hoeveel dagen per week gebruikte uw kind gemiddeld een tablet (ipad of ander merk) in de avond/nacht tussen 19.00 en 06.00 uur? (in de afgelopen 4 weken)                    | eveningnight_tablet_chi_q_1          | chscreen3a      | [[BLUQ]]        | 8-12     |
| on average, how many hours did your child use a tablet between 19.00h and 06.00h? (in the last 4 weeks)                                                                | hoeveel uur besteedde uw kind dan gemiddeld tussen 19.00 en 06.00 uur aan het gebruik van een tablet? (in de afgelopen 4 weken)                                              | eveningnight_tablet_chi_q_1_a        | chscreen3b      | [[BLUQ]]        | 8-12     |
| watching movies/clips/television/netflix / what do you do on the tablet at that moment? (evening/night)                                                                | film(pjes)/tv/netflix kijken / wat doet uw kind dan op de tablet? (avond/nacht)                                                                                              | eveningnight_tablet_chi_q_1_b1       | chscreen3c1     | [[BLUQ]]        | 8-12     |
| playing games (for example via app or website) / what does your child do on the tablet at that moment? (evening/night)                                                 | spelletjes spelen (bijvoorbeeld via app of website) / wat doet uw kind dan op de tablet? (avond/nacht)                                                                       | eveningnight_tablet_chi_q_1_b2       | chscreen3c2     | [[BLUQ]]        | 8-12     |
| surfing the web / what does your child do on the tablet at that moment? (evening/night)                                                                                | websites bezoeken / wat doet uw kind dan op de tablet? (avond/nacht)                                                                                                         | eveningnight_tablet_chi_q_1_b3       | chscreen3c3     | [[BLUQ]]        | 8-12     |
| e-mailing, using whatsapp (or use of another chat programme) / what does your child do on the tablet at that moment? (evening/night)                                   | e-mailen, whatsapp gebruiken (of gebruik ander chatprogramma) / wat doet uw kind dan op de tablet? (avond/nacht)                                                             | eveningnight_tablet_chi_q_1_b4       | chscreen3c4     | [[BLUQ]]        | 8-12     |
| using social media (facebook, twitter, etc.) / what does your child do on the tablet at that moment? (evening/night)                                                   | social media gebruiken (facebook, twitter etc.) / wat doet uw kind dan op de tablet? (avond/nacht)                                                                           | eveningnight_tablet_chi_q_1_b5       | chscreen3c5     | [[BLUQ]]        | 8-12     |
| reading an e-book or pdf / what does your child do on the tablet at that moment? (evening/night)                                                                       | e-book/pdf lezen / wat doet uw kind dan op de tablet? (avond/nacht)                                                                                                          | eveningnight_tablet_chi_q_1_b6       | chscreen3c6     | [[BLUQ]]        | 8-12     |
| processing text or data (word, excel, etc.) / what does your child do on the tablet at that moment? (evening/night)                                                    | tekst/data-verwerking (word, excel etc.) / wat doet uw kind dan op de tablet? (avond/nacht)                                                                                  | eveningnight_tablet_chi_q_1_b7       | chscreen3c7     | [[BLUQ]]        | 8-12     |
| i don't know / what does your child do on the tablet at that moment? (evening/night)                                                                                   | weet ik niet / wat doet uw kind dan op de tablet? (avond/nacht)                                                                                                              | eveningnight_tablet_chi_q_1_b8       | chscreen3c8     | [[BLUQ]]        | 8-12     |
| other activity: / what does your child do on the tablet at that moment? (evening/night)                                                                                | anders, nl. / wat doet uw kind dan op de tablet? (avond/nacht)                                                                                                               | eveningnight_tablet_chi_q_1_b9       | chscreen3c9     | [[BLUQ]]        | 8-12     |
| specification other activity / what does your child do on the tablet at that moment? (evening/night)                                                                   | specificatie anders, nl. / wat doet uw kind dan op de tablet? (avond/nacht)                                                                                                  | eveningnight_tablet_chi_q_1_b9a      | chscreen3c9txt  | [[BLUQ]]        | 8-12     |
| on average, how many days a week did your child use a tv between 19.00h and 06.00h? (in the last 4 weeks)                                                              | hoeveel dagen per week gebruikte uw kind gemiddeld een televisie in de avond/nacht tussen 19.00 en 06.00 uur? (in de afgelopen 4 weken)                                      | eveningnight_television_chi_q_1      | chscreen4a      | [[BLUQ]]        | 8-12     |
| on average, how many hours did your child use a tv between 19.00h and 06.00h? (in the last 4 weeks)                                                                    | hoeveel uur besteedde uw kind dan gemiddeld tussen 19.00 en 06.00 uur aan het gebruik van een televisie? (in de afgelopen 4 weken)                                           | eveningnight_television_chi_q_1_a    | chscreen4b      | [[BLUQ]]        | 8-12     |
| watching movies/clips/tv/netflix / what does your child do on the tv at that moment? (evening/night)                                                                   | film(pjes)/tv/netflix kijken / wat doet uw kind dan op de televisie? (avond/nacht)                                                                                           | eveningnight_television_chi_q_1_b1   | chscreen4c1     | [[BLUQ]]        | 8-12     |
| playing games (for example via game console, pc, or app) / what does your child do on the tv at that moment? (evening/night)                                           | spelletjes spelen (bijvoorbeeld via gameconsole, pc of app) / wat doet uw kind dan op de televisie? (avond/nacht)                                                            | eveningnight_television_chi_q_1_b2   | chscreen4c2     | [[BLUQ]]        | 8-12     |
| surfing the web / what does your child do on the tv at that moment? (evening/night)                                                                                    | websites bezoeken / wat doet uw kind dan op de televisie? (avond/nacht)                                                                                                      | eveningnight_television_chi_q_1_b3   | chscreen4c3     | [[BLUQ]]        | 8-12     |
| e-mailing, using whatsapp (or use of another chat programme) / what does your child do on the tv at that moment? (evening/night)                                       | e-mailen, whatsapp gebruiken (of gebruik ander chatprogramma) / wat doet uw kind dan op de televisie? (avond/nacht)                                                          | eveningnight_television_chi_q_1_b4   | chscreen4c4     | [[BLUQ]]        | 8-12     |
| using social media (facebook, twitter, etc.) / what does your child do on the tv at that moment? (evening/night)                                                       | social media gebruiken (facebook, twitter etc.) / wat doet uw kind dan op de televisie? (avond/nacht)                                                                        | eveningnight_television_chi_q_1_b5   | chscreen4c5     | [[BLUQ]]        | 8-12     |
| reading an e-book or pdf / what does your child do on the tv at that moment? (evening/night)                                                                           | e-book/pdf lezen / wat doet uw kind dan op de televisie? (avond/nacht)                                                                                                       | eveningnight_television_chi_q_1_b6   | chscreen4c6     | [[BLUQ]]        | 8-12     |
| processing text or data (word, excel, etc.) / what does your child do on the tv at that moment? (evening/night)                                                        | tekst/data-verwerking (word, excel etc.) / wat doet uw kind dan op de televisie? (avond/nacht)                                                                               | eveningnight_television_chi_q_1_b7   | chscreen4c7     | [[BLUQ]]        | 8-12     |
| i don't know / what does your child do on the tv at that moment? (evening/night)                                                                                       | weet ik niet / wat doet uw kind dan op de televisie? (avond/nacht)                                                                                                           | eveningnight_television_chi_q_1_b8   | chscreen4c8     | [[BLUQ]]        | 8-12     |
| other activity: / what does your child do on the tv at that moment? (evening/night)                                                                                    | anders, nl / wat doet uw kind dan op de televisie? (avond/nacht)                                                                                                             | eveningnight_television_chi_q_1_b9   | chscreen4c9     | [[BLUQ]]        | 8-12     |
| specification other activity / what does your child do on the tv at that moment? (evening/night)                                                                       | specificatie anders, nl. / wat doet uw kind dan op de televisie? (avond/nacht)                                                                                               | eveningnight_television_chi_q_1_b9a  | chscreen4c9txt  | [[BLUQ]]        | 8-12     |

===Screen use adolescents in BLUQ===
| **Label English**                                                                                                                                                | **Label Dutch**                                                                                                                                                         | **Code**                             | **Variable**     | **Assessment**  | **Age**  |
| on how many days a week did you use a pc/laptop in the hour before going to sleep? (in the last 4 weeks)                                                         | hoeveel dagen per week gebruikte je gemiddeld een pc/laptop in het uur voor het slapen gaan? (in de afgelopen 4 weken)                                                  | beforesleep_computer_ach_q_1         | achscreen5a      | [[BLUQ]]        | 13-17    |
| watching movies/clips/television/netflix / what do you do on the pc/laptop at that moment? (hour before sleep)                                                   | film(pjes)/tv/netflix kijken / wat doe je dan op de pc/laptop? (uur voor slapen)                                                                                        | beforesleep_computer_ach_q_1_a1      | achscreen5b1     | [[BLUQ]]        | 13-17    |
| playing games (for example via pc, app, or website) / what do you do on the pc/laptop at that moment? (hour before sleep)                                        | spelletjes spelen (bijvoorbeeld via pc, app of website) / wat doe je dan op de pc/laptop? (uur voor slapen)                                                             | beforesleep_computer_ach_q_1_a2      | achscreen5b2     | [[BLUQ]]        | 13-17    |
| surfing the web / what do you do on the pc/laptop at that moment? (hour before sleep)                                                                            | websites bezoeken / wat doe je dan op de pc/laptop? (uur voor slapen)                                                                                                   | beforesleep_computer_ach_q_1_a3      | achscreen5b3     | [[BLUQ]]        | 13-17    |
| e-mailing, using whatsapp (or use of another chat programme) / what do you do on the pc/laptop at that moment? (hour before sleep)                               | e-mailen, whatsapp gebruiken (of gebruik ander chatprogramma) / wat doe je dan op de pc/laptop? (uur voor slapen)                                                       | beforesleep_computer_ach_q_1_a4      | achscreen5b4     | [[BLUQ]]        | 13-17    |
| using social media (facebook, twitter, etc.) / what do you do on the pc/laptop at that moment? (hour before sleep)                                               | social media gebruiken (facebook, twitter etc.) / wat doe je dan op de pc/laptop? (uur voor slapen)                                                                     | beforesleep_computer_ach_q_1_a5      | achscreen5b5     | [[BLUQ]]        | 13-17    |
| reading an e-book or pdf / what do you do on the pc/laptop at that moment? (hour before sleep)                                                                   | e-book/pdf lezen / wat doe je dan op de pc/laptop? (uur voor slapen)                                                                                                    | beforesleep_computer_ach_q_1_a6      | achscreen5b6     | [[BLUQ]]        | 13-17    |
| processing text or data (word, excel, etc.) / what do you do on the pc/laptop at that moment? (hour before sleep)                                                | tekst/data-verwerking (word, excel etc.) / wat doe je dan op de pc/laptop? (uur voor slapen)                                                                            | beforesleep_computer_ach_q_1_a7      | achscreen5b7     | [[BLUQ]]        | 13-17    |
| other activity: / what do you do on the pc/laptop at that moment? (hour before sleep)                                                                            | anders, nl. / wat doe je dan op de pc/laptop? (uur voor slapen)                                                                                                         | beforesleep_computer_ach_q_1_a8      | achscreen5b8     | [[BLUQ]]        | 13-17    |
| specification other activity / what do you do on the pc/laptop at that moment? (hour before sleep)                                                               | specificatie anders, nl. / wat doe je dan op de pc/laptop? (uur voor slapen)                                                                                            | beforesleep_computer_ach_q_1_a8a     | achscreen5b8txt  | [[BLUQ]]        | 13-17    |
| on how many days a week did you use a smartphone in the hour before going to sleep? (in the last 4 weeks)                                                        | hoeveel dagen per week gebruikte je gemiddeld een smartphone in het uur voor het slapen gaan? (in de afgelopen 4 weken)                                                 | beforesleep_smartphone_ach_q_1       | achscreen6a      | [[BLUQ]]        | 13-17    |
| watching movies/clips/television/netflix / what do you do on the smartphone at that moment? (hour before sleep)                                                  | film(pjes)/tv/netflix kijken / wat doe je dan op de smartphone? (uur voor slapen)                                                                                       | beforesleep_smartphone_ach_q_1_a1    | achscreen6b1     | [[BLUQ]]        | 13-17    |
| playing games (for example via app or website) / what do you do on the smartphone at that moment? (hour before sleep)                                            | spelletjes spelen (bijvoorbeeld via app of website) / wat doe je dan op de smartphone? (uur voor slapen)                                                                | beforesleep_smartphone_ach_q_1_a2    | achscreen6b2     | [[BLUQ]]        | 13-17    |
| surfing the web / what do you do on the smartphone at that moment? (hour before sleep)                                                                           | websites bezoeken / wat doe je dan op de smartphone? (uur voor slapen)                                                                                                  | beforesleep_smartphone_ach_q_1_a3    | achscreen6b3     | [[BLUQ]]        | 13-17    |
| e-mailing, using whatsapp (or use of another chat programme) / what do you do on the smartphone at that moment? (hour before sleep)                              | e-mailen, whatsapp gebruiken (of gebruik ander chatprogramma) / wat doe je dan op de smartphone? (uur voor slapen)                                                      | beforesleep_smartphone_ach_q_1_a4    | achscreen6b4     | [[BLUQ]]        | 13-17    |
| using social media (facebook, twitter, etc.) / what do you do on the smartphone at that moment? (hour before sleep)                                              | social media gebruiken (facebook, twitter etc.) / wat doe je dan op de smartphone? (uur voor slapen)                                                                    | beforesleep_smartphone_ach_q_1_a5    | achscreen6b5     | [[BLUQ]]        | 13-17    |
| reading an e-book or pdf / what do you do on the smartphone at that moment? (hour before sleep)                                                                  | e-book/pdf lezen / wat doe je dan op de smartphone? (uur voor slapen)                                                                                                   | beforesleep_smartphone_ach_q_1_a6    | achscreen6b6     | [[BLUQ]]        | 13-17    |
| processing text or data (word, excel, etc.) / what do you do on the smartphone at that moment? (hour before sleep)                                               | tekst/data-verwerking (word, excel etc.) / wat doe je dan op de smartphone? (uur voor slapen)                                                                           | beforesleep_smartphone_ach_q_1_a7    | achscreen6b7     | [[BLUQ]]        | 13-17    |
| other activity: / what do you do on the smartphone at that moment? (hour before sleep)                                                                           | anders, nl. / wat doe je dan op de smartphone? (uur voor slapen)                                                                                                        | beforesleep_smartphone_ach_q_1_a8    | achscreen6b8     | [[BLUQ]]        | 13-17    |
| specification other activity / what do you do on the smartphone at that moment? (hour before sleep)                                                              | specificatie anders, nl. / wat doe je dan op de smartphone? (uur voor slapen)                                                                                           | beforesleep_smartphone_ach_q_1_a8a   | achscreen6b8txt  | [[BLUQ]]        | 13-17    |
| on how many days a week did you use a tablet (ipad or other brand) in the hour before going to sleep? (in the last 4 weeks)                                      | hoeveel dagen per week gebruikte je gemiddeld een tablet (ipad of ander merk) in het uur voor het slapen gaan? (in de afgelopen 4 weken)                                | beforesleep_tablet_ach_q_1           | achscreen7a      | [[BLUQ]]        | 13-17    |
| watching movies/clips/television/netflix / what do you do on the tablet at that moment? (hour before sleep)                                                      | film(pjes)/tv/netflix kijken / wat doe je dan op de tablet? (uur voor slapen)                                                                                           | beforesleep_tablet_ach_q_1_a1        | achscreen7b1     | [[BLUQ]]        | 13-17    |
| playing games (for example via app or website) / what do you do on the tablet at that moment? (hour before sleep)                                                | spelletjes spelen (bijvoorbeeld via app of website) / wat doe je dan op de tablet? (uur voor slapen)                                                                    | beforesleep_tablet_ach_q_1_a2        | achscreen7b2     | [[BLUQ]]        | 13-17    |
| surfing the web / what do you do on the tablet at that moment? (hour before sleep)                                                                               | websites bezoeken / wat doe je dan op de tablet? (uur voor slapen)                                                                                                      | beforesleep_tablet_ach_q_1_a3        | achscreen7b3     | [[BLUQ]]        | 13-17    |
| e-mailing, using whatsapp (or use of another chat programme) / what do you do on the tablet at that moment? (hour before sleep)                                  | e-mailen, whatsapp gebruiken (of gebruik ander chatprogramma) / wat doe je dan op de tablet? (uur voor slapen)                                                          | beforesleep_tablet_ach_q_1_a4        | achscreen7b4     | [[BLUQ]]        | 13-17    |
| using social media (facebook, twitter, etc.) / what do you do on the tablet at that moment? (hour before sleep)                                                  | social media gebruiken (facebook, twitter etc.) / wat doe je dan op de tablet? (uur voor slapen)                                                                        | beforesleep_tablet_ach_q_1_a5        | achscreen7b5     | [[BLUQ]]        | 13-17    |
| reading an e-book or pdf / what do you do on the tablet at that moment? (hour before sleep)                                                                      | e-book/pdf lezen / wat doe je dan op de tablet? (uur voor slapen)                                                                                                       | beforesleep_tablet_ach_q_1_a6        | achscreen7b6     | [[BLUQ]]        | 13-17    |
| processing text or data (word, excel, etc.) / what do you do on the tablet at that moment? (hour before sleep)                                                   | tekst/data-verwerking (word, excel etc.) / wat doe je dan op de tablet? (uur voor slapen)                                                                               | beforesleep_tablet_ach_q_1_a7        | achscreen7b7     | [[BLUQ]]        | 13-17    |
| other activity: / what do you do on the tablet at that moment? (hour before sleep)                                                                               | anders, nl. / wat doe je dan op de tablet? (uur voor slapen)                                                                                                            | beforesleep_tablet_ach_q_1_a8        | achscreen7b8     | [[BLUQ]]        | 13-17    |
| specification other activity / what do you do on the tablet at that moment? (hour before sleep)                                                                  | specificatie anders, nl. / wat doe je dan op de tablet? (uur voor slapen)                                                                                               | beforesleep_tablet_ach_q_1_a8a       | achscreen7b8txt  | [[BLUQ]]        | 13-17    |
| on how many days a week did you use a tv in the hour before going to sleep? (in the last 4 weeks)                                                                | hoeveel dagen per week gebruikte je gemiddeld een televisie in het uur voor het slapen gaan? (in de afgelopen 4 weken)                                                  | beforesleep_television_ach_q_1       | achscreen8a      | [[BLUQ]]        | 13-17    |
| watching movies/clips/television/netflix / what do you do on the tv at that moment? (hour before sleep)                                                          | film(pjes)/tv/netflix kijken / wat doe je dan op de televisie? (uur voor slapen)                                                                                        | beforesleep_television_ach_q_1_a1    | achscreen8b1     | [[BLUQ]]        | 13-17    |
| playing games (for example via game console, pc, or app) / what do you do on the tv at that moment? (hour before sleep)                                          | spelletjes spelen (bijvoorbeeld via gameconsole, pc of app) / wat doe je dan op de televisie? (uur voor slapen)                                                         | beforesleep_television_ach_q_1_a2    | achscreen8b2     | [[BLUQ]]        | 13-17    |
| surfing the web / what do you do on the tv at that moment? (hour before sleep)                                                                                   | websites bezoeken / wat doe je dan op de televisie? (uur voor slapen)                                                                                                   | beforesleep_television_ach_q_1_a3    | achscreen8b3     | [[BLUQ]]        | 13-17    |
| e-mailing, using whatsapp (or use of another chat programme) / what do you do on the tv at that moment? (hour before sleep)                                      | e-mailen, whatsapp gebruiken (of gebruik ander chatprogramma) / wat doe je dan op de televisie? (uur voor slapen)                                                       | beforesleep_television_ach_q_1_a4    | achscreen8b4     | [[BLUQ]]        | 13-17    |
| using social media (facebook, twitter, etc.) / what do you do on the tv at that moment? (hour before sleep)                                                      | social media gebruiken (facebook, twitter etc.) / wat doe je dan op de televisie? (uur voor slapen)                                                                     | beforesleep_television_ach_q_1_a5    | achscreen8b5     | [[BLUQ]]        | 13-17    |
| reading an e-book or pdf / what do you do on the tv at that moment? (hour before sleep)                                                                          | e-book/pdf lezen / wat doe je dan op de televisie? (uur voor slapen)                                                                                                    | beforesleep_television_ach_q_1_a6    | achscreen8b6     | [[BLUQ]]        | 13-17    |
| processing text or data (word, excel, etc.) / what do you do on the tv at that moment? (hour before sleep)                                                       | tekst/data-verwerking (word, excel etc.) / wat doe je dan op de televisie? (uur voor slapen)                                                                            | beforesleep_television_ach_q_1_a7    | achscreen8b7     | [[BLUQ]]        | 13-17    |
| other activity: / what do you do on the tv at that moment? (hour before sleep)                                                                                   | anders, nl. / wat doe je dan op de televisie? (uur voor slapen)                                                                                                         | beforesleep_television_ach_q_1_a8    | achscreen8b8     | [[BLUQ]]        | 13-17    |
| specification other activity / what do you do on the tv at that moment? (hour before sleep)                                                                      | specificatie anders, nl. / wat doe je dan op de televisie? (uur voor slapen)                                                                                            | beforesleep_television_ach_q_1_a8a   | achscreen8b8txt  | [[BLUQ]]        | 13-17    |
| pc/laptop / on which devices did you regularly (more than 1x per week) use programmes or apps to filter blue light during the evening/night?                     | pc/laptop / op welke apparaten gebruikte je regelmatig (meer dan 1x per week) programma's of apps om blauw licht te filteren tijdens de avond/nacht?                    | bluelight_filter_ach_q_1_a           | achscreen9a      | [[BLUQ]]        | 13-17    |
| smartphone / on which devices did you regularly (more than 1x per week) use programmes or apps to filter blue light during the evening/night?                    | smartphone / op welke apparaten gebruikte je regelmatig (meer dan 1x per week) programma's of apps om blauw licht te filteren tijdens de avond/nacht?                   | bluelight_filter_ach_q_1_b           | achscreen9b      | [[BLUQ]]        | 13-17    |
| tablet (ipad or other brand) / on which devices did you regularly (more than 1x per week) use programmes or apps to filter blue light during the evening/night?  | tablet (ipad of ander merk) / op welke apparaten gebruikte je regelmatig (meer dan 1x per week) programma's of apps om blauw licht te filteren tijdens de avond/nacht?  | bluelight_filter_ach_q_1_c           | achscreen9c      | [[BLUQ]]        | 13-17    |
| tv / on which devices did you regularly (more than 1x per week) use programmes or apps to filter blue light during the evening/night?                            | tv / op welke apparaten gebruikte je regelmatig (meer dan 1x per week) programma's of apps om blauw licht te filteren tijdens de avond/nacht?                           | bluelight_filter_ach_q_1_d           | achscreen9d      | [[BLUQ]]        | 13-17    |
| none of my devices / on which devices did you regularly (more than 1x per week) use programmes or apps to filter blue light during the evening/night?            | geen van de apparaten / op welke apparaten gebruikte uw kind regelmatig (meer dan 1x per week) programma's of apps om blauw licht te filteren tijdens de avond/nacht?   | bluelight_filter_ach_q_1_e           | achscreen9e      | [[BLUQ]]        | 13-17    |
| how often did you manually adjust the light intensity (brightness) of the pc/laptop?                                                                             | hoe vaak paste je de lichtinstellingen van de pc/laptop handmatig aan?                                                                                                  | brightness_computer_ach_q_1          | achscreen1d      | [[BLUQ]]        | 13-17    |
| how often did you manually adjust the light intensity (brightness) of the smartphone?                                                                            | hoe vaak paste je de lichtinstellingen van de smartphone handmatig aan?                                                                                                 | brightness_smartphone_ach_q_1        | achscreen2d      | [[BLUQ]]        | 13-17    |
| how often did you manually adjust the light intensity (brightness) of the tablet?                                                                                | hoe vaak paste je de lichtinstellingen van de tablet handmatig aan?                                                                                                     | brightness_tablet_ach_q_1            | achscreen3d      | [[BLUQ]]        | 13-17    |
| how often did you manually adjust the light intensity (brightness) of the tv?                                                                                    | hoe vaak paste je de lichtinstellingen van de televisie handmatig aan (of deed u of een ander gezinslid dit voor uw kind)?                                              | brightness_television_ach_q_1        | achscreen4d      | [[BLUQ]]        | 13-17    |
| On average, how many days a week did you use a pc/laptop between 19.00h and 06.00h? (in the last 4 weeks)                                                        | hoeveel dagen per week gebruikte je gemiddeld een pc/laptop in de avond/nacht tussen 19.00 en 06.00 uur? (in de afgelopen 4 weken)                                      | eveningnight_computer_ach_q_1        | achscreen1a      | [[BLUQ]]        | 13-17    |
| on average, how many hours did you use a pc/laptop between 19.00h and 06.00h? (in the last 4 weeks)                                                              | hoeveel uur besteedde je dan gemiddeld tussen 19.00 en 06.00 uur aan het gebruik van een pc/laptop? (in de afgelopen 4 weken)                                           | eveningnight_computer_ach_q_1_a      | achscreen1b      | [[BLUQ]]        | 13-17    |
| watching movies/clips/television/netflix / what do you do on the pc/laptop at that moment? (evening/night)                                                       | film(pjes)/tv/netflix kijken / wat doe je dan op de pc/laptop (avond/nacht)                                                                                             | eveningnight_computer_ach_q_1_b1     | achscreen1c1     | [[BLUQ]]        | 13-17    |
| playing games (for example via pc, app, or website) / what do you do on the pc/laptop at that moment? (evening/night)                                            | spelletjes spelen (bijvoorbeeld via pc, app of website) / wat doe je dan op de pc/laptop (avond/nacht)                                                                  | eveningnight_computer_ach_q_1_b2     | achscreen1c2     | [[BLUQ]]        | 13-17    |
| surfing the web / what do you do on the pc/laptop at that moment? (evening/night)                                                                                | websites bezoeken / wat doe je dan op de pc/laptop (avond/nacht)                                                                                                        | eveningnight_computer_ach_q_1_b3     | achscreen1c3     | [[BLUQ]]        | 13-17    |
| e-mailing, using whatsapp (or use of another chat programme) / what do you do on the pc/laptop at that moment? (evening/night)                                   | e-mailen, whatsapp gebruiken (of gebruik ander chatprogramma) / wat doe je dan op de pc/laptop (avond/nacht)                                                            | eveningnight_computer_ach_q_1_b4     | achscreen1c4     | [[BLUQ]]        | 13-17    |
| using social media (facebook, twitter, etc.) / what do you do on the pc/laptop at that moment? (evening/night)                                                   | social media gebruiken (facebook, twitter etc.) / wat doe je dan op de pc/laptop (avond/nacht)                                                                          | eveningnight_computer_ach_q_1_b5     | achscreen1c5     | [[BLUQ]]        | 13-17    |
| reading an e-book or pdf / what do you do on the pc/laptop at that moment? (evening/night)                                                                       | e-book/pdf lezen / wat doe je dan op de pc/laptop (avond/nacht)                                                                                                         | eveningnight_computer_ach_q_1_b6     | achscreen1c6     | [[BLUQ]]        | 13-17    |
| processing text or data (word, excel, etc.) / what do you do on the pc/laptop at that moment? (evening/night)                                                    | tekst/data-verwerking (word, excel etc.) / wat doe je dan op de pc/laptop (avond/nacht)                                                                                 | eveningnight_computer_ach_q_1_b7     | achscreen1c7     | [[BLUQ]]        | 13-17    |
| other activity: / what do you do on the pc/laptop at that moment? (evening/night)                                                                                | anders, nl. / wat doe je dan op de pc/laptop (avond/nacht)                                                                                                              | eveningnight_computer_ach_q_1_b8     | achscreen1c8     | [[BLUQ]]        | 13-17    |
| specification other activity / what do you do on the pc/laptop at that moment? (evening/night)                                                                   | specificatie anders, nl. / wat doe je dan op de pc/laptop (avond/nacht)                                                                                                 | eveningnight_computer_ach_q_1_b8a    | achscreen1c8txt  | [[BLUQ]]        | 13-17    |
| on average, how many days a week did you use a smartphone between 19.00h and 06.00h? (in the last 4 weeks)                                                       | hoeveel dagen per week gebruikte je gemiddeld een smartphone in de avond/nacht tussen 19.00 en 06.00 uur? (in de afgelopen 4 weken)                                     | eveningnight_smartphone_ach_q_1      | achscreen2a      | [[BLUQ]]        | 13-17    |
| on average, how many hours did you use a smartphone between 19.00h and 06.00h? (in the last 4 weeks)                                                             | hoeveel uur besteedde je dan gemiddeld tussen 19.00 en 06.00 uur aan het gebruik van een smartphone? (in de afgelopen 4 weken)                                          | eveningnight_smartphone_ach_q_1_a    | achscreen2b      | [[BLUQ]]        | 13-17    |
| watching movies/clips/television/netflix / what do you do on the smartphone at that moment? (evening/night)                                                      | film(pjes)/tv/netflix kijken / wat doe je dan op de smartphone (avond/nacht)                                                                                            | eveningnight_smartphone_ach_q_1_b1   | achscreen2c1     | [[BLUQ]]        | 13-17    |
| playing games (for example via app or website) / what do you do on the smartphone at that moment? (evening/night)                                                | spelletjes spelen (bijvoorbeeld via app of website) / wat doe je dan op de smartphone (avond/nacht)                                                                     | eveningnight_smartphone_ach_q_1_b2   | achscreen2c2     | [[BLUQ]]        | 13-17    |
| surfing the web / what do you do on the smartphone at that moment? (evening/night)                                                                               | websites bezoeken / wat doe je dan op de smartphone (avond/nacht)                                                                                                       | eveningnight_smartphone_ach_q_1_b3   | achscreen2c3     | [[BLUQ]]        | 13-17    |
| e-mailing, using whatsapp (or use of another chat programme) / what do you do on the smartphone at that moment? (evening/night)                                  | e-mailen, whatsapp gebruiken (of gebruik ander chatprogramma) / wat doe je dan op de smartphone (avond/nacht)                                                           | eveningnight_smartphone_ach_q_1_b4   | achscreen2c4     | [[BLUQ]]        | 13-17    |
| using social media (facebook, twitter, etc.) / what do you do on the smartphone at that moment? (evening/night)                                                  | social media gebruiken (facebook, twitter etc.) / wat doe je dan op de smartphone (avond/nacht)                                                                         | eveningnight_smartphone_ach_q_1_b5   | achscreen2c5     | [[BLUQ]]        | 13-17    |
| reading an e-book or pdf / what do you do on the smartphone at that moment? (evening/night)                                                                      | e-book/pdf lezen / wat doe je dan op de smartphone (avond/nacht)                                                                                                        | eveningnight_smartphone_ach_q_1_b6   | achscreen2c6     | [[BLUQ]]        | 13-17    |
| processing text or data (word, excel, etc.) / what do you do on the smartphone at that moment? (evening/night)                                                   | tekst/data-verwerking (word, excel etc.) / wat doe je dan op de smartphone (avond/nacht)                                                                                | eveningnight_smartphone_ach_q_1_b7   | achscreen2c7     | [[BLUQ]]        | 13-17    |
| other activity: / what do you do on the smartphone at that moment? (evening/night)                                                                               | anders, nl. / wat doe je dan op de smartphone (avond/nacht)                                                                                                             | eveningnight_smartphone_ach_q_1_b8   | achscreen2c8     | [[BLUQ]]        | 13-17    |
| specification other activity / what do you do on the smartphone at that moment? (evening/night)                                                                  | specificatie anders, nl. / wat doe je dan op de smartphone (avond/nacht)                                                                                                | eveningnight_smartphone_ach_q_1_b8a  | achscreen2c8txt  | [[BLUQ]]        | 13-17    |
| on average, how many days a week did you use a tablet (ipad or other brand) between 19.00h and 06.00h? (in the last 4 weeks)                                     | hoeveel dagen per week gebruikte je gemiddeld een tablet (ipad of ander merk) in de avond/nacht tussen 19.00 en 06.00 uur? (in de afgelopen 4 weken)                    | eveningnight_tablet_ach_q_1          | achscreen3a      | [[BLUQ]]        | 13-17    |
| on average, how many hours did you use a tablet between 19.00h and 06.00h? (in the last 4 weeks)                                                                 | hoeveel uur besteedde je dan gemiddeld tussen 19.00 en 06.00 uur aan het gebruik van een tablet? (in de afgelopen 4 weken)                                              | eveningnight_tablet_ach_q_1_a        | achscreen3b      | [[BLUQ]]        | 13-17    |
| watching movies/clips/television/netflix / what do you do on the tablet at that moment? (evening/night)                                                          | film(pjes)/tv/netflix kijken / wat doe je dan op de tablet (avond/nacht)                                                                                                | eveningnight_tablet_ach_q_1_b1       | achscreen3c1     | [[BLUQ]]        | 13-17    |
| playing games (for example via app or website) / what do you do on the tablet at that moment? (evening/night)                                                    | spelletjes spelen (bijvoorbeeld via app of website) / wat doe je dan op de tablet (avond/nacht)                                                                         | eveningnight_tablet_ach_q_1_b2       | achscreen3c2     | [[BLUQ]]        | 13-17    |
| surfing the web / what do you do on the tablet at that moment? (evening/night)                                                                                   | websites bezoeken / wat doe je dan op de tablet (avond/nacht)                                                                                                           | eveningnight_tablet_ach_q_1_b3       | achscreen3c3     | [[BLUQ]]        | 13-17    |
| e-mailing, using whatsapp (or use of another chat programme) / what do you do on the tablet at that moment? (evening/night)                                      | e-mailen, whatsapp gebruiken (of gebruik ander chatprogramma) / wat doe je dan op de tablet (avond/nacht)                                                               | eveningnight_tablet_ach_q_1_b4       | achscreen3c4     | [[BLUQ]]        | 13-17    |
| using social media (facebook, twitter, etc.) / what do you do on the tablet at that moment? (evening/night)                                                      | social media gebruiken (facebook, twitter etc.) / wat doe je dan op de tablet (avond/nacht)                                                                             | eveningnight_tablet_ach_q_1_b5       | achscreen3c5     | [[BLUQ]]        | 13-17    |
| reading an e-book or pdf / what do you do on the tablet at that moment? (evening/night)                                                                          | e-book/pdf lezen / wat doe je dan op de tablet (avond/nacht)                                                                                                            | eveningnight_tablet_ach_q_1_b6       | achscreen3c6     | [[BLUQ]]        | 13-17    |
| processing text or data (word, excel, etc.) / what do you do on the tablet at that moment? (evening/night)                                                       | tekst/data-verwerking (word, excel etc.) / wat doe je dan op de tablet (avond/nacht)                                                                                    | eveningnight_tablet_ach_q_1_b7       | achscreen3c7     | [[BLUQ]]        | 13-17    |
| other activity: / what do you do on the tablet at that moment? (evening/night)                                                                                   | anders, nl. / wat doe je dan op de tablet (avond/nacht)                                                                                                                 | eveningnight_tablet_ach_q_1_b8       | achscreen3c8     | [[BLUQ]]        | 13-17    |
| specification other activity / what do you do on the tablet at that moment? (evening/night)                                                                      | specificatie anders, nl. / wat doe je dan op de tablet (avond/nacht)                                                                                                    | eveningnight_tablet_ach_q_1_b8a      | achscreen3c8txt  | [[BLUQ]]        | 13-17    |
| on average, how many days a week did you use a tv between 19.00h and 06.00h? (in the last 4 weeks)                                                               | hoeveel dagen per week gebruikte je gemiddeld een televisie in de avond/nacht tussen 19.00 en 06.00 uur? (in de afgelopen 4 weken)                                      | eveningnight_television_ach_q_1      | achscreen4a      | [[BLUQ]]        | 13-17    |
| on average, how many hours did you use a tv between 19.00h and 06.00h? (in the last 4 weeks)                                                                     | hoeveel uur besteedde je dan gemiddeld tussen 19.00 en 06.00 uur aan het gebruik van een televisie? (in de afgelopen 4 weken)                                           | eveningnight_television_ach_q_1_a    | achscreen4b      | [[BLUQ]]        | 13-17    |
| watching movies/clips/tv/netflix / what do you do on the tv at that moment? (evening/night)                                                                      | film(pjes)/tv/netflix kijken / wat doe je dan op de televisie (avond/nacht)                                                                                             | eveningnight_television_ach_q_1_b1   | achscreen4c1     | [[BLUQ]]        | 13-17    |
| playing games (for example via game console, pc, or app) / what do you do on the tv at that moment? (evening/night)                                              | spelletjes spelen (bijvoorbeeld via gameconsole, pc of app) / wat doe je dan op de televisie (avond/nacht)                                                              | eveningnight_television_ach_q_1_b2   | achscreen4c2     | [[BLUQ]]        | 13-17    |
| surfing the web / what do you do on the tv at that moment? (evening/night)                                                                                       | websites bezoeken / wat doe je dan op de televisie (avond/nacht)                                                                                                        | eveningnight_television_ach_q_1_b3   | achscreen4c3     | [[BLUQ]]        | 13-17    |
| e-mailing, using whatsapp (or use of another chat programme) / what do you do on the tv at that moment? (evening/night)                                          | e-mailen, whatsapp gebruiken (of gebruik ander chatprogramma) / wat doe je dan op de televisie (avond/nacht)                                                            | eveningnight_television_ach_q_1_b4   | achscreen4c4     | [[BLUQ]]        | 13-17    |
| using social media (facebook, twitter, etc.) / what do you do on the tv at that moment? (evening/night)                                                          | social media gebruiken (facebook, twitter etc.) / wat doe je dan op de televisie (avond/nacht)                                                                          | eveningnight_television_ach_q_1_b5   | achscreen4c5     | [[BLUQ]]        | 13-17    |
| reading an e-book or pdf / what do you do on the tv at that moment? (evening/night)                                                                              | e-book/pdf lezen / wat doe je dan op de televisie (avond/nacht)                                                                                                         | eveningnight_television_ach_q_1_b6   | achscreen4c6     | [[BLUQ]]        | 13-17    |
| processing text or data (word, excel, etc.) / what do you do on the tv at that moment? (evening/night)                                                           | tekst/data-verwerking (word, excel etc.) / wat doe je dan op de televisie (avond/nacht)                                                                                 | eveningnight_television_ach_q_1_b7   | achscreen4c7     | [[BLUQ]]        | 13-17    |
| other activity: / what do you do on the tv at that moment? (evening/night)                                                                                       | anders, nl / wat doe je dan op de televisie (avond/nacht)                                                                                                               | eveningnight_television_ach_q_1_b8   | achscreen4c8     | [[BLUQ]]        | 13-17    |
| specification other activity / what do you do on the tv at that moment? (evening/night)                                                                          | specificatie anders, nl. / wat doe je dan op de televisie (avond/nacht)                                                                                                 | eveningnight_television_ach_q_1_b8a  | achscreen4c8txt  | [[BLUQ]]        | 13-17    |
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