This study will recruit 60 night shift workers with shift work disorder. They will be invited to wear actigraphy for 3 weeks. In the first week the participants will sleep at the time they used to, and their chronotype will be determined by actigraphy and Munich Chronotype Questionnaire. In the second week the participants will be randomly assigned to morning sleep or evening sleep time, and will change to the other in the third week. We will compare sleepiness, sleep quality, daytime vigilance score changes using mixed method ANOVA. We will also examine the interaction effect of chronotype and sleep schedule on sleep-related outcome.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
60
sleep right after night shifts
sleep before night shifts
China Medical University Hospital
Taichung, Taiwan
Sleep quality
Pittsburgh sleep quality index (PSQI), range from 0 (better) to 21 (worse)
Time frame: Change from baseline score at the second and third week.
Daytime sleepiness
Karolinska Sleepiness Scale (KSS), range from 1 (better) to 9 (worse)
Time frame: Change from baseline score at the start and end of each night shift.
Alertness
Psychomotor vigilance test (PVT), reaction time (longer the worse) and lapses (larger the worse)
Time frame: Change from baseline score at the start and end of each night shift.
This platform is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.