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Rudolf Magnus Institute of Neuroscience, Department of Psychiatry, University Medical Centre Utrecht, The Netherlands
Correspondence: Dr. J. P. Selten, University Hospital, PO Box 85500, 3508 GA Utrecht, Reference Number A00.241, The Netherlands. Tel: + 31 30 2508180; fax: + 31 30 2505443; email: j.p.selten{at}umcutrecht.nl
Background Migration is a risk factor for the development of schizophrenia.
Aims To examine whether migration is also a risk factor for bipolar affective disorder, unipolar depressive disorder and mood disorders in general.
Method Medline was searched for population-based incidence studies concerning mood disorders among migrants and mean relative risks were computed using a mixed-effects statistical model.
Results Only a few studies of unipolar depressive disorder were retrieved. The mean relative risk of developing bipolar affective disorder among migrants was 2.47 (95% CI 1.334.59). However, after excluding people of AfricanCaribbean origin in the UK this risk was no longer significantly increased. The mean relative risk of mood disorders of unspecified polarity was 1.25 (95% CI 1.041.49) and that of any mood disorder was 1.38 (95% CI 1.171.62).
Conclusions There is no conclusive evidence for a large increase in the risk of mood disorders associated with migration.
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