Participants answered several questions on their use of electronic devices (section: lifestyle & environment).
Assessment of mobile phone use can be found here here, and assessment of compulsive use of internet can be found here. Note that questions on this topic have been asked to child participants as well, see subsections Hobbies & Activities (<18) and Screen use (<18). Also note that more detailed questions regarding electronic device use (and their effect on sleeping patterns) were asked to a subcohort of adults in the additional questionnaire on shiftwork (SHIQ) and to a subcohort of children in the additional questionnaire on blue light exposure (BLUQ).