Circadian preference in bipolar disorder

• Published in: Sleep & breathing Vol. 14; no. 2; pp. 153 - 155
• Main Authors: Giglio, Larriany Maria Falsin, Magalhães, Pedro V. S., Andersen, Mônica Levy, Walz, Julio Cesar, Jakobson, Lourenço, Kapczinski, Flávio
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer-Verlag 01.06.2010; Springer; Springer Nature B.V
• Subjects: Adult; Biological and medical sciences; Bipolar disorder; Bipolar Disorder - epidemiology; Bipolar Disorder - psychology; Brazil; Choice Behavior; Circadian Rhythm; Dentistry; Disorders of higher nervous function. Focal brain diseases. Central vestibular syndrome and deafness. Brain stem syndromes; Female; Fundamental and applied biological sciences. Psychology; Humans; Internal Medicine; Male; Medical sciences; Medicine; Medicine & Public Health; Middle Aged; Nervous system (semeiology, syndromes); Nervous system as a whole; Neurology; Otorhinolaryngology; Pathology; Pediatrics; Pneumology/Respiratory System; Short Communication; Sleep; Sleep Disorders, Circadian Rhythm - epidemiology; Sleep Disorders, Circadian Rhythm - psychology; Sleep. Vigilance; Statistics as Topic; Vertebrates: nervous system and sense organs; Wakefulness; Brazil; Bipolar disorder; Circadian rhythm; Morningness; Sleep latency; Eveningness; Mood disorder; Nervous system diseases; Sleep; Sleep disorder; Biological rhythm; Sleep wake cycle; Neurological disorder
• ISSN: 1520-9512; 1522-1709
• DOI: 10.1007/s11325-009-0301-3

Purpose A role for circadian rhythm abnormalities in the pathogenesis of bipolar disorder (BD) has been suggested. The present study assessed circadian preference, a subjective preference for activities in the morning or evening related to chronotype. Methods The sample was comprised of 81 outpatients with BD in remission and 79 control subjects. Circadian preference was derived from an interview evaluating biological rhythms and sleep pattern from the Pittsburgh Sleep Quality Index. Results Patients were significantly more likely to have an evening preference than control subjects. Circadian preference was also associated with sleep latency. Conclusions The association of evening preference and longer sleep latency may be related to the frequent clinical observation of a sleep/wake cycle reversal in bipolar disorder.