Seasonal variation in bipolar disorder.

  title={Seasonal variation in bipolar disorder.},
  author={Timo Partonen and Jouko L{\"o}nnqvist},
  journal={The British journal of psychiatry : the journal of mental science},
  volume={169 5},
BACKGROUND In patients with bipolar disorder, admissions for manic and depressive episodes frequently display a seasonal pattern. We examined this variation and compared the patterns with the seasonal admission rates for schizophrenia. METHOD Patients with bipolar disorder or schizophrenia were identified from the Finnish Hospital Discharge Register of in-patient admissions to all psychiatric hospitals during the years 1969-91. They were included in the analysis if the first admission had… CONTINUE READING

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