Journal
CHRONOBIOLOGY INTERNATIONAL
Volume 26, Issue 4, Pages 780-788Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/07420520902929060
Keywords
Bipolar disorder; Chronotype; Body composition
Categories
Funding
- Obesity and Nutrition Research Center Pilot and Feasibility Awards [DK046204]
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We explored whether obesity in patients with bipolar disorder is associated with their chronotype. A group of 29 patients with bipolar I disorder, not currently experiencing an affective episode, were assessed for total body fat, mood symptoms, and self-reported circadian chronotype and sleep quality. Chronotype explained 19% of the variance in body fat, after age, sex, mood state, and sleep quality were accounted for. This association suggested that evening chronotype patients have a higher percentage of total body fat. Evening chronotype could be a proxy for as yet unknown specific causes of the high rate of obesity and obesity-related diseases in bipolar disorder.
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