title: [Bipolar affective disorder. A retrospective study of 158 patients in a well-defined geographical region].
abstract: A cohort of 158 patients was identified from 723 patients admitted in 1990 or treated as outpatients in 1991 for affective disorders in three university hospitals in Copenhagen, covering a well-defined catchment area. The cohort was subclassified for seasonal pattern according to DSM-III-R. Meteorological data of temperature, hours of sunshine, rainfall and wind-velocity expressed as mean values/month were obtained from the Institute of Meteorology in Copenhagen. There was no relationship between the annual dis- tribution of affective episodes and meteorological data, neither in the total cohort nor in the subgroup of patients with seasonal patterns The present study does not support the hypothesis that a relation exists between start of a new episode and the season or climatic condition.
authors.affiliation: H:S Bispebjerg Hospital, psykiatrisk afdeling E.
authors.forename: E M
authors.initials: EM
authors.lastname: Christensen
authors.forename: A
authors.initials: A
authors.lastname: Gjerris
authors.forename: C
authors.initials: C
authors.lastname: Gjerris
authors.forename: J K
authors.initials: JK
authors.lastname: Larsen
mesh_terms: D000328:Adult; D000368:Aged; D001714:Bipolar Disorder / Q000175:diagnosis / Q000209:etiology / Q000401:mortality; D015331:Cohort Studies; D003718:Denmark / Q000453:epidemiology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010343:Patient Admission; D012189:Retrospective Studies; D016574:Seasonal Affective Disorder / Q000175:diagnosis / Q000209:etiology / Q000401:mortality; D013472:Sunlight; D014887:Weather