Fluctuations in schizophrenic births by year
| Autor: | E F Torrey, R R Rawlings |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
Gerontology
Adult Male Psychosis medicine.medical_specialty 03 medical and health sciences 0302 clinical medicine Pregnancy Risk Factors Statistical significance Epidemiology medicine Humans 030212 general & internal medicine Undifferentiated schizophrenia Birth Rate Birth Year Aged business.industry Incidence Middle Aged medicine.disease United States 030227 psychiatry Psychiatry and Mental health Cross-Sectional Studies Schizophrenia Prenatal Exposure Delayed Effects Birth date Female Seasons business Demography |
| Zdroj: | The British journal of psychiatry : the journal of mental science. 169(6) |
| ISSN: | 0007-1250 |
| Popis: | BackgroundIt has previously been reported that births of individuals who later develop schizophrenia vary by birth year.MethodBirth data were analysed on 34 024 individuals diagnosed with DSM–III–R disorganised, catatonic, and undifferentiated schizophrenia using time series analysis.ResultsMinor yearly fluctuations were observed but did not achieve statistical significance. Thus earlier findings reported in the literature could not be replicated using a different statistical approach.ConclusionThe findings do not support theories which assume major yearly fluctuations in the births of individuals with schizophrenia. Such theories include the perinatal effects of influenza, temperature variation, and the effects of severe weather. |
| Databáze: | OpenAIRE |
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