Hypersomnia: an overlooked, but not overestimated, sleep disturbance in bipolar disorder.

Sleep disturbances are common across bipolar spectrum disorders. Reduced need for sleep, insomnia and hypersomnia (excessive sleep or sleepiness) are diagnostic features of illness episodes; these sleep disturbances persist into the interepisode period and are associated with functional impairment and risk for relapse.1 Few studies have investigated subtypes of sleep disturbances within bipolar spectrum disorders, and these have been limited to specific illness states (eg, depression)2 or to specific bipolar subtypes (eg, bipolar I disorder).3This cross-sectional study recruited 563 inpatient and outpatient adults with bipolar disorder types I and II (BD I and BD II) across Norway. Two semistructured clinician-administered interviews, the Inventory of Depressive Symptomatology (IDS-C) and Young Mania Rating Scale (YMRS), were used to assess mood state.
Source: Current Awareness Service for Health (CASH) - Category: Consumer Health News Source Type: news