Sleep-Circadian Rhythm

Sleep-related questionnaires and interviews

Pittsburg Sleep Quality Index (PSQI)

The REM Sleep Behavior Disorder Screening Questionnaire (RBDSQ)

STOP Qeustionnaire

Cambridge-Hopkins questionnaire for restless leg syndrome (CH-RLSq)

Morningness-eveningness questionnaire-Korean version (MEQ-K)

Interview for past sleep habits (sleep duration and quality)

Actiwatch monitoring and sleep diaries

A subset of participants wear the Actiwatch 2 on their non-dominant wrist for seven consecutive 24-hour periods.
Sleep diaries were also completed by these individuals.


A subset of participants undergo overnight polysomnography
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