Subjective versus objective evening chronotypes in bipolar disorder.

•Chronotype measured in 61 BD subjects and 61 controls via self-report and actigraphy.•BD subjects showed more evening chronotype than controls using both measures.•Self-report and actigraphy chronotype correlated within groups and across full sample.•21 nights of actigraphy correctly identified evening chronotype in ≥ 95% of subjects.