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Clinical Trial Summary

The purpose of this study is to examine the effectiveness of a personalized light exposure schedule for Shift Work Disorder (SWD) in night shift workers compared to a non-personalized light exposure schedule.


Clinical Trial Description

Participants will be randomized into each condition (n = 25) in a 1:1 ratio. Variables of interest, dim light melatonin onset (DLMO) and shift work disorder (SWD) symptoms, will be assessed before and after the intervention, which will last two weeks. All participants (N=50) will be asked to wear an Apple Watch for two weeks leading up to an in-lab visit. Activity data collection from the Apple Watch will be processed through a mathematical model of the human circadian pacemaker (previously validated in SWD) to generate estimates of DLMO. This two-week period is followed by a 27-hour laboratory visit for pre-treatment assessment of DLMO (hourly saliva melatonin samples over 24 hours). At the end of this visit, participants will receive an orientation to the SHIFT mobile application, where they will be able to assess their prescribed light exposure schedule. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT05186233
Study type Interventional
Source Henry Ford Health System
Contact Philip Cheng, PhD
Phone 248-344-7361
Email [email protected]
Status Not yet recruiting
Phase N/A
Start date February 1, 2022
Completion date January 31, 2025

See also
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Recruiting NCT04869098 - Effects of an Evening PROtein PrEload on Metabolic Health in Night ShIfT Workers (PROPENSITy) N/A