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How often do you nap? Per day/week/month

How many nights do you use the device during an average week?

Item from Pittsburgh Sleep Quality Index. Buysse et. al 1989 (PubMed ID: 2748771)External semantic reference: CDEOriginal text: The following questions relate to your usual sleep habits during the past month only. Your answers should indicate the most accurate reply for the majority of days and nights in the past month. If you have a roommate or bed partner, ask him/her how often in the past month you have had: Loud snoring Search for all PSQI variables within this dataset

Item from Pittsburgh Sleep Quality Index. Buysse et. al 1989 (PubMed ID: 2748771)External semantic reference: CDEOriginal text: The following questions relate to your usual sleep habits during the past month only. Your answers should indicate the most accurate reply for the majority of days and nights in the past month. If you have a roommate or bed partner, ask him/her how often in the past month you have had: Long pauses between breaths while asleep Search for all PSQI variables within this dataset

Item from Pittsburgh Sleep Quality Index. Buysse et. al 1989 (PubMed ID: 2748771)External semantic reference: CDEOriginal text: The following questions relate to your usual sleep habits during the past month only. Your answers should indicate the most accurate reply for the majority of days and nights in the past month. If you have a roommate or bed partner, ask him /her how often in the past month you have had: Leg twitching or jerking while you sleep Search for all PSQI variables within this dataset

Item from Pittsburgh Sleep Quality Index. Buysse et. al 1989 (PubMed ID: 2748771)External semantic reference: CDEOriginal text: The following questions relate to your usual sleep habits during the past month only. Your answers should indicate the most accurate reply for the majority of days and nights in the past month. If you have a roommate or bed partner, ask him/her how often in the past month you have had: Episodes of disorientation or confusion during sleep Search for all PSQI variables within this dataset

Item from Pittsburgh Sleep Quality Index. Buysse et. al 1989 (PubMed ID: 2748771)External semantic reference: CDEOriginal text: The following questions relate to your usual sleep habits during the past month only. Your answers should indicate the most accurate reply for the majority of days and nights in the past month. If you have a roommate or bed partner, ask him/her how often in the past month you have had: Other restlessness while you sleep Search for all PSQI variables within this dataset

This variable is the sum of the score of the A and F parts of the Word Fluency test. Only defined for participants who took a neurocognitive assessment (NEE form).

According to what others have told you, or to your own awareness, how often, if ever, do you have momentary periods during sleep when you stop breathing or you breathe abnormally?

How often, if ever, have you awakened suddenly with the feeling of gasping or choking?

According to what others have told you, or to your own awareness, how often, if ever, do you gasp, choke, or make snorting sounds during sleep?

According to what others have told you or to your own awareness, how often do you snore?

Calculated - If any of the four insomnia symptoms (i.e. difficulty falling asleep, difficulty falling back to sleep, waking up frequently, waking up too early) have a frequency of more than 5-15 time a month, then it is a 1: yes.

Calculated: Count the number of insomnia symptoms (i.e. difficulty falling asleep, difficulty falling back to sleep, waking up frequently, waking up too early) with a frequency of more than 5-15 time a month.

How often, if ever, do you have any of the following problems sleeping? (Circle one response for each item.) Do you have nightmares or disturbing dreams?

Item from the Medical Outcomes Study Short Form 36 (SF-36). Ware JE and Sherbourne CD, 1992 (PubMed ID: 1593914)Original question: During the past 4 weeks, how much of the time: Has your health limited your social activities (like visiting with friends or close relatives)?Search for all SF-36 variables within this dataset

Item from the Medical Outcomes Study Short Form 36 (SF-36). Ware JE and Sherbourne CD, 1992 (PubMed ID: 1593914)Original question: 10. During the past 4 weeks, how much of the time has your health limited your social activities (like visiting with friends or close relatives)? (Check one box.)Search for all SF-36 variables within this dataset