How sleep timing relates to internal body clock phases measured by melatonin onset predicted from light and activity
Updated
Abstract
Total sleep time and composite sleep health were associated with all 3 pDLMO-based phase angles (< .001 for all).
- Phase angles for sleep onset and sleep offset were associated with total wake time in bed (< .001 for both).
- Each relationship exhibited a clear peak related to a specific phase angle.
- No relationships were found between phase angles and sleep maintenance efficiency or self-reported sleep quality.
- pDLMO-based phase angles can be easily measured in natural settings.
- These phase angles may help identify circadian-sleep misalignment in clinical practice.
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Funding
Competing interests
This research was supported by the Department of Veterans Affairs (VA) Office of Academic Affiliations Advanced Fellowship Program in Mental Illness Research and Treatment, as well as the Rocky Mountain Mental Illness Research, Education, and Clinical Center. Sponsors had no role in the design or conduct of the present study nor in the preparation of this manuscript. All work for this study was performed at the VA Rocky Mountain Mental Illness Research, Education, and Clinical Center for Veteran Suicide Prevention. Since some of the authors are employees of the United States Government and contributed to this manuscript as part of their official duties, the work is not subject to United States copyright. The views expressed in this article are those of the authors and do not necessarily represent those of the United States Department of VA or the United States government. All authors have seen and approved of this manuscript. The authors have no conflicts of interest to disclose.
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