The authors of this paper do not have any commercial associations that might pose a conflict of interest in connection with this manuscript.
The prospective impact of sleep duration on depression and mania
Article first published online: 12 MAY 2006
Volume 8, Issue 3, pages 271–274, June 2006
How to Cite
Perlman, C. A., Johnson, S. L. and Mellman, T. A. (2006), The prospective impact of sleep duration on depression and mania. Bipolar Disorders, 8: 271–274. doi: 10.1111/j.1399-5618.2006.00330.x
- Issue published online: 12 MAY 2006
- Article first published online: 12 MAY 2006
- Received 1 October 2003, revised and accepted for publication 19 October 2005
- bipolar disorder;
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.