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Seasonal influences on first-episode admission in affective and non-affective psychosis

Hallam, Karen and Berk, Michael and Kader, Linda and Conus, Philippe and Lucas, Nellie and Hasty, Melissa and MacNeil, Craig and McGorry, Patrick D (2006) Seasonal influences on first-episode admission in affective and non-affective psychosis. Acta Neuropsychiatrica, 18 (3-4). pp. 154-161. ISSN 0924-2708

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Abstract

Background: Since bipolar affective disorder has been recorded, clinicians treating patients with this disorder have noted the cyclic nature of episodes, particularly an increase in mania in the spring and summer months and depression during winter. Objective: The aim of this study was to investigate seasonality in symptom onset and service admissions over a period of 10 years in a group of patients (n ¼ 359) with first-episode (FE) mania (n ¼ 133), FE schizoaffective disorder (n ¼ 49) and FE schizophrenia (n ¼ 177). Method: Patients were recruited if they were between 15 and 28 years of age and if they resided in the geographical mental health service catchment area. The number of patients experiencing symptom onset and service admission over each month and season was recorded. Results: In terms of seasonality of time of service admission, the results indicate a high overall seasonality (particularly in men), which was observed in both the schizoaffective and the bipolar groups. In terms of seasonality of symptom onset, the results indicate that seasonality remains in the male bipolar group, but other groups have no seasonal trend. Conclusions: This provides further evidence that systems mediating the entrainment of biological rhythms to the environment may be more pronounced in BPAD than in schizoaffective disorder and schizophrenia. These results may help facilitate the preparedness of mental heath services for patients at different times of the year.

Item Type: Article
Uncontrolled Keywords: ResPubID16569, biological rhythm, bipolar disorder, first episode, schizoaffective disorder, schizophrenia, seasonality
Subjects: Faculty/School/Research Centre/Department > School of Social Sciences and Psychology
FOR Classification > 1103 Clinical Sciences
Depositing User: VUIR
Date Deposited: 01 May 2012 04:04
Last Modified: 24 Mar 2015 03:41
URI: http://vuir.vu.edu.au/id/eprint/2988
DOI: 10.1111/j.1601-5215.2006.00147.x
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Citations in Scopus: 3 - View on Scopus

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