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Related Experiment Videos

Sex differences in birth patterns of schizophrenics.

G J Syme, D J Illingworth

    Journal of Clinical Psychology
    |July 1, 1978
    PubMed
    Summary

    Schizophrenia birth patterns show seasonal variations, with males born in June and females in September exhibiting higher incidence. Neurosis birth patterns, however, remained consistent with the general population.

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    Area of Science:

    • Psychiatry
    • Epidemiology
    • Perinatal Psychology

    Background:

    • Seasonal birth patterns in psychiatric disorders are not well understood.
    • Previous research has yielded inconsistent findings regarding birth seasonality and mental health conditions.

    Purpose of the Study:

    • To investigate potential seasonal variations in birth dates for Western Australian psychiatric patients.
    • To compare birth patterns of patients with schizophrenia, anxiety neurosis, and depressive neurosis against the general population.

    Main Methods:

    • Statistical analysis of birth dates for non-aboriginal, first-admission psychiatric patients (born 1920-1950) in Western Australia.
    • Comparison with general population birth data.
    • Examination of International Classification of Diseases (I.C.D.) categories: schizophrenia, anxiety neurosis, and depressive neurosis.

    Main Results:

    • No significant deviations from normal birth patterns were observed for anxiety neurosis or depressive neurosis.
    • A notable excess of births in June was found for males diagnosed with schizophrenia.
    • A similar excess of births in September was observed for females diagnosed with schizophrenia.

    Conclusions:

    • Schizophrenia exhibits a distinct seasonal birth pattern, differing between sexes.
    • Anxiety neurosis and depressive neurosis do not appear to have seasonal birth influences.
    • Further research is needed to explore the reasons behind the observed sex-specific seasonal variations in schizophrenia births.

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