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

Apr 11, 2022Journal of psychiatric research

Timing links between daily mood and sleep patterns in bipolar disorder

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Abstract

Participants with bipolar disorder (n = 56) wore actigraphy devices for up to 14 days to assess sleep and mood relationships.

Poor self-reported sleep quality is associated with worse overall ratings of sadness and anger.
Worse self-reported sleep quality predicts greater sadness the following day.
Higher daytime impulsivity is linked to worse sleep quality the following night.
Mood ratings from ecological momentary assessment correlate with validated scales for depression, mania, anxiety, and impulsivity.
Exploratory analyses suggest relationships between more variable mood and more variable sleep on the same evening.

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

Abstract

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