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Role of Sleep Reactivity in Shift Work Disorder
Sponsor: Henry Ford Health System
Summary
The purpose of this project is to test sleep reactivity as an independent cause of Shift Work Disorder (SWD). The primary hypothesis is that those with high sleep reactivity will show persistent SWD symptoms after experimental reduction of circadian misalignment, which will then be mitigated with CBT.
Official title: Sleep Reactivity as a Novel Mechanism in Shift Work Disorder
Key Details
Gender
All
Age Range
18 Years - Any
Study Type
INTERVENTIONAL
Enrollment
150
Start Date
2023-01-01
Completion Date
2027-10-01
Last Updated
2025-10-14
Healthy Volunteers
No
Conditions
Interventions
Active phototherapy
Timed bright light exposure delivered in a controlled laboratory setting (10,000 photopic lux) designed to delay the DLMO to 4 am or later.
Control phototherapy
Timed less intense light exposure delivered in a controlled laboratory setting (100 photopic lux) that still has a perceptible alerting effect but is not designed to shift circadian phase.
Cognitive Behavioral Therapy (CBT)
Cognitive strategies will identify stressors (e.g., dysfunctional beliefs about sleep) and intervene on worry and rumination with cognitive reappraisal and active coping. Sessions will be conducted by a trained behavioral sleep medicine provider via telemedicine to increase accessibility.
Sleep education control
Sleep duration recommendations will be equivalent to the CBT group (8 hours of sleep opportunity) to ensure that outcomes are not confounded by time in bed. Materials in the sleep education control condition will be separated into weekly electronic materials monitored for engagement and completion.
Locations (1)
Henry Ford Columbus Medical Center
Novi, Michigan, United States