Shift Work Schedule
Conditions
Brief summary
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.
Interventions
BEHAVIORALMorning sleep schedule
sleep right after night shifts
BEHAVIORALEvening sleep schedule
sleep before night shifts
Sponsors
China Medical University Hospital
Study design
Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
TREATMENT
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
20 Years to No maximum
Healthy volunteers
No
Inclusion criteria
* Shift work disorder
Exclusion criteria
* Neuromuscular disorder * Taking hypnotics * Pregnancy
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Sleep quality | Change from baseline score at the second and third week. | Pittsburgh sleep quality index (PSQI), range from 0 (better) to 21 (worse) |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Daytime sleepiness | Change from baseline score at the start and end of each night shift. | Karolinska Sleepiness Scale (KSS), range from 1 (better) to 9 (worse) |
| Alertness | Change from baseline score at the start and end of each night shift. | Psychomotor vigilance test (PVT), reaction time (longer the worse) and lapses (larger the worse) |
Countries
Taiwan
Outcome results
None listed