Longer Sleep Duration Predicts Progression to Bipolar or Psychotic Disorders in Youth Accessing Early Intervention Mental Health Services.
ABSTRACT Background While growing evidence implicates sleep‐wake and circadian rhythm disturbances (SCRDs) in the onset and course of mood and psychotic disorders, longitudinal studies using objective measures are limited. This clinical cohort study examined whether actigraphy‐derived SCRDs (sleep duration, timing, and efficiency) predicted transition to (i) any full‐threshold mental disorders; and then specifically; (ii) full‐threshold bipolar or psychotic disorders; or (iii) other full‐thres...