[Influence of heredity, sex and season on the type of episode of bipolar disorder].

The aim of this work was to investigate if sex, age, family history, season and hypothyroidism have any influence on the type of episodes (manic, depressive, mixed) seen in bipolar patients. This retrospective study concerns a sample of 208 patients with a diagnosis of bipolar disorder (type I or II), who were admitted in one of two psychiatric centers between July 1996 and June 2000. The sex-ratio was 2.