title: Clinical characteristics of circadian rhythm sleep disorders.
abstract: From our practice at the sleep disorders clinic in Kohnodai Hospital, National Center of Neurology and Psychiatry (NCNP), we report the clinical characteristics of circadian sleep-wake rhythm disorders. Nearly 90% of circadian rhythm sleep disorders were diagnosed as delayed sleep phase syndrome (DSPS) or as non-24 sleep-wake syndrome (non-24). While DSPS was equally common in males and females, non-24 was more frequently seen in men. It was of psychiatric interest that a considerable number of patients had depressive states in the course of their circadian rhythm sleep disorders. Difficulty in adapting to social life was more severe in patients with non-24 than in those with DSPS.
authors.affiliation: Department of Psychiatry, Kohnodai Hospital, National Center of Neurology and Psychiatry, Chiba, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Kamei
authors.forename: J
authors.initials: J
authors.lastname: Urata
authors.forename: M
authors.initials: M
authors.lastname: Uchiyaya
authors.forename: T
authors.initials: T
authors.lastname: Hayakawa
authors.forename: S
authors.initials: S
authors.lastname: Ozaki
authors.forename: K
authors.initials: K
authors.lastname: Shibui
authors.forename: M
authors.initials: M
authors.lastname: Okawa
mesh_terms: D000328:Adult; D002940:Circadian Rhythm; D003863:Depression / Q000175:diagnosis / Q000523:psychology; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008297:Male; D012189:Retrospective Studies; D012893:Sleep Wake Disorders / Q000145:classification / Q000175:diagnosis* / Q000523:psychology; D012917:Social Adjustment; D013001:Somatoform Disorders / Q000145:classification / Q000175:diagnosis / Q000523:psychology; D014851:Wakefulness