In an additional assessment on blue light exposure and sleep quality in underage participants (BLUQ), the ‘loss of energy’ and ‘sleepiness’ scales of the Chronic Sleep Reduction Questionnaire (section: Children & adolescents) were used to assess sleep loss1).
Furthermore, general questions on sleep were also asked to underage participants.
| Label English | Label Dutch | Code | Variable | Assessment | Age |
| does your child feel well rested at school? (in the past 4 weeks) | Wanneer uw kind op school is, voelt hij/zij zich dan uitgeslapen? | csrq_rested_chi_q_02 | CHSLEEP50A | BLUQ | 8-12 |
| does your child have enough energy during the day to do everything? (in the past 4 weeks) | Heeft uw kind gedurende de dag genoeg energie om overal aan mee te doen? | csrq_energy_chi_q_11 | CHSLEEP50B | BLUQ | 8-12 |
| it happens that your child does not feel like going to school because your child feels too tired (in the past 4 weeks) | Het gebeurt dat uw kind geen zin heeft om naar school te gaan, omdat uw kind zich te moe voelt | csrq_tired_chi_q_15 | CHSLEEP50C | BLUQ | 8-12 |
| your child is active during the day (in the past 4 weeks) | Uw kind is actief overdag | csrq_active_chi_q_12 | CHSLEEP50D | BLUQ | 8-12 |
| your child feels very alert at school (in the past 4 weeks) | Op school voelt uw kind zich klaarwakker | csrq_alert_chi_q_16 | CHSLEEP50E | BLUQ | 8-12 |
| does your child feel sleepy during the day? (in the past 4 weeks) | Voelt uw kind zich overdag slaperig? | csrq_sleepy_chi_q_03 | CHSLEEP50F | BLUQ | 8-12 |
| your child has to struggle to stay awake in the class (in the past 4 weeks) | Uw kind moet zijn/haar best doen om wakker te blijven als hij/zij in de klas zit | csrq_stayawake_chi_q_13 | CHSLEEP50G | BLUQ | 8-12 |
| does your child often yawn throughout the day? (in the past 4 weeks) | Moet uw kind vaak gapen overdag? | csrq_yawn_chi_q_04 | CHSLEEP50H | BLUQ | 8-12 |
| my child has trouble keeping his/her eyes open when he/she is at school for a while (in the past 4 weeks) | Mijn kind heeft moeite om zijn/haar ogen open te houden als hij/zij een tijd op school zit | csrq_eyesopen_chi_q_08 | CHSLEEP50I | BLUQ | 8-12 |
| do you feel well rested at school? (in the past 4 weeks) | Wanneer je op school bent, voel je je dan uitgeslapen? | csrq_rested_ach_q_02 | ACHSLEEP38A | BLUQ | 13-17 |
| do you have enough energy during the day to do everything? (in the past 4 weeks) | Heb je gedurende de dag genoeg energie om overal aan mee te doen? | csrq_energy_ach_q_11 | ACHSLEEP38B | BLUQ | 13-17 |
| it happens that i do not feel like going to school because i feel too tired (in the past 4 weeks) | Het gebeurt dat ik geen zin heb om naar school te gaan, omdat ik me te moe voel | csrq_tired_ach_q_15 | ACHSLEEP38C | BLUQ | 13-17 |
| i am active during the day (in the past 4 weeks) | Ik ben actief overdag | csrq_active_ach_q_12 | ACHSLEEP38D | BLUQ | 13-17 |
| i feel very alert at school (in the past 4 weeks) | Op school voel ik me klaarwakker | csrq_alert_ach_q_16 | ACHSLEEP38E | BLUQ | 13-17 |
| does you feel sleepy during the day? (in the past 4 weeks) | Voel je je overdag slaperig? | csrq_sleepy_ach_q_03 | ACHSLEEP38F | BLUQ | 13-17 |
| i have to struggle to stay awake in the class (in the past 4 weeks) | Ik moet mijn best doen om wakker te blijven als ik in de klas zit | csrq_stayawake_ach_q_13 | ACHSLEEP38G | BLUQ | 13-17 |
| do you often yawn throughout the day? (in the past 4 weeks) | Moet je vaak gapen overdag? | csrq_yawn_ach_q_04 | ACHSLEEP38H | BLUQ | 13-17 |
| i have trouble keeping my eyes open when i am at school for a while (in the past 4 weeks) | Ik heb moeite om mijn ogen open te houden als ik een tijd op school zit | csrq_eyesopen_ach_q_08 | ACHSLEEP38I | BLUQ | 13-17 |