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. 2006 Jun;8(3):271-4.
doi: 10.1111/j.1399-5618.2006.00330.x.

The prospective impact of sleep duration on depression and mania

Carol A Perlman  1 , Sheri L Johnson, Thomas A Mellman
Affiliations

The prospective impact of sleep duration on depression and mania

Carol A Perlman et al. Bipolar Disord. 2006 Jun.

Abstract

Objective: Many patients report sleeping less than 6 h per night during episodes of depression and mania. This type of sleep deficit may also be a risk factor for subsequent mood episodes; however, the long-term impact of sleep deficit remains unclear. The current study is among few longitudinal studies to assess the prospective effect of sleep deficit on depression and mania.

Methods: A subsample of 54 individuals from a longitudinal study of bipolar I disorder was selected. Participants entered the study during a mood episode. Baseline symptom data were collected at month 4 to allow for recovery from the initial episode, sleep was assessed at month 6, and follow-up symptom data were obtained during months 7-12.

Results: Sleep deficit predicted depressive symptoms across the 6-month follow-up but not mania.

Conclusions: It is likely that the impact of sleep deficit on mania was probably missed because assessments covered a full month. Monitoring sleep duration may help predict depression in bipolar disorder and provide an opportunity for targeting intervention.

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