Season and manic relapse.
The episodes of mania occurring in a cohort of 86 patients with bipolar affective disorder were recorded over a 6-year period. Of the 54 patients who had at least 2 episodes, 8 (15%) met our criteria for a seasonal pattern of relapse. There was no particular season in which these relapses clustered. Overall, the time of year of the first recorded episode during the 6-year period did not predict the timing of subsequent episodes.
Hunt
N
N
Department of Psychological Medicine, St Bartholomew's Hospital, West Smithfield, London, United Kingdom.
Sayer
H
H
Silverstone
T
T
D001714:Bipolar Disorder / Q000453:epidemiology / Q000523:psychology*; D016000:Cluster Analysis; D015331:Cohort Studies; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D011336:Probability; D012008:Recurrence; D016574:Seasonal Affective Disorder / Q000453:epidemiology / Q000523:psychology; D012621:Seasons