Temporal relationships of ecological momentary mood and actigraphy-based sleep measures in bipolar disorder.

J Psychiatr Res

Department of Psychiatry, University of California San Diego, 9500 Gilman Dr. La Jolla, CA, 92093, USA; Sam and Rose Stein Institute for Research on Aging, University of California San Diego, 9500 Gilman Dr. La Jolla, CA, 92093, USA; Desert-Pacific Mental Illness Research Education and Clinical Center, Veterans Affairs San Diego Healthcare System, 3350 La Jolla Village Dr, San Diego, CA, 92161, USA. Electronic address:

Published: June 2022

Sleep disturbances are a key feature of bipolar disorder (BD), and poor sleep has been linked to mood symptoms. Recent use of ecological momentary assessment (EMA) has allowed for nuanced exploration of the sleep-mood link; though, the scale and directionality of this relationship is still unclear. Using EMA, actigraphy, and self-reported sleep measures, this study examines the concurrent and predictive relationships between sleep and mood. Participants with BD (n = 56) wore actigraphy devices for up to 14 days and completed validated scales and daily EMA surveys about mood and sleep quality. Linear mixed models were used to examine overall and time-lagged relationships between sleep and mood variables. EMA mood ratings were correlated with validated rating scales for depression, mania, anxiety, and impulsivity. Poor self-reported sleep quality was associated with worse overall ratings of sadness and anger. Worse self-reported sleep quality was associated with greater sadness the following day. Higher daytime impulsivity was associated with worse sleep quality the following night. Exploratory analyses found relationships between worse and more variable mood (sadness, anger, and impulsivity) with worse and more variable sleep that evening (efficiency, WASO, and sleep onset time). The sample size was modest, fairly homogenous, and included mainly euthymic persons with BD. EMA-based assessments of mood and sleep are correlated with validated scale scores and provide novel insight into intra-individual variability. Further work on the complex two-way interactions between sleep and mood is needed to better understand how to improve outcomes in BD.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9107496PMC
http://dx.doi.org/10.1016/j.jpsychires.2022.03.055DOI Listing

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