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Seasonality of births in affective disorder in an Irish population

  • M Clarke (a1), F Keogh (a2), PT Murphy (a1), M Morris (a1), C Larkin (a1), D Walsh (a2) and E O’Callaghan (a1)...

Summary

Seasonal variation in the births of patients with schizophrenia is a consistently replicated epidemiological finding. Few studies have investigated this phenomenon among patients with a diagnosis of affective disorder. The majority of season of birth studies have employed the chi square test for statistical analysis, a method that has been subject to some criticism. Using a Kolgomorov-Smirnov type statistic, the quarterly birth distribution of 6,646 patients with an ICD 9/10 diagnosis of affective disorder were compared to the general population. Only the births of those individuals with unipolar forms of affective disorder (n = 4,393) differed significantly from the general population, with significant excesses and deficits in the second quarter and fourth quarter respectively. These results were not altered by application of the displacement test. © 1998 Elsevier, Paris

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Seasonality of births in affective disorder in an Irish population

  • M Clarke (a1), F Keogh (a2), PT Murphy (a1), M Morris (a1), C Larkin (a1), D Walsh (a2) and E O’Callaghan (a1)...

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Seasonality of births in affective disorder in an Irish population

  • M Clarke (a1), F Keogh (a2), PT Murphy (a1), M Morris (a1), C Larkin (a1), D Walsh (a2) and E O’Callaghan (a1)...
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