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Seasonality of Mania: a Tasmanian study


Jones, IH and Hornsby, H and Hay, D, Seasonality of Mania: a Tasmanian study, Australian and New Zealand Journal of Psychiatry, 29, (3) pp. 449-453. ISSN 0004-8674 (1995) [Refereed Article]

DOI: doi:10.3109/00048679509064953


Objective: The aim of the study was to examine the seasonal incidence of mania in a new Southern Hemisphere location. Method: Using the Tasmanian psychiatric database, monthly admission rates were compared with expected admission rates for mania for the period 1983 to 1989. ICD-9 criteria for mania single episode (296.0) and mania recurrent episodes (296.1) were used, excluding individuals with a bipolar disorder (296.4 to 296.89). Results: One thousand three hundred and twenty-eight persons were admitted during this period. There was a significant monthly variation with admissions occurring most commonly in the summer, but this was not consistent during the seven year period. Conclusions: There was a statistically significant but inconstant summer excess. The inconstancy of the finding suggests that the phenomenon is not a simple consequence of light duration, and closer examination of these inconsistencies may lead to further elucidation of the phenomenon.

Item Details

Item Type:Refereed Article
Research Division:Health Sciences
Research Group:Health services and systems
Research Field:Mental health services
Objective Division:Health
Objective Group:Other health
Objective Field:Other health not elsewhere classified
UTAS Author:Jones, IH (Professor Ivor Jones)
UTAS Author:Hornsby, H (Ms Helen Hornsby)
ID Code:4795
Year Published:1995
Web of Science® Times Cited:15
Deposited By:Clinical Sciences
Deposited On:1995-08-01
Last Modified:2011-08-24

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