Journal
BRITISH JOURNAL OF PSYCHIATRY
Volume 179, Issue -, Pages 346-350Publisher
ROYAL COLLEGE OF PSYCHIATRISTS
DOI: 10.1192/bjp.179.4.346
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Background The association between social inequality at birth and subsequent risk of schizophrenia is uncertain. Aims To investigate the relationship between adult-onset schizophrenia and two indicators of social inequality at birth: social class and area of residence. Method A matched case-control design was used with data from birth certificates of first-episode cases and age- and gender-matched controls. Results Risk increased with increasing levels of deprivation at birth. Subjects whose fathers were social class IV-Vor who were born in deprived areas were at increased risk of schizophrenia (odds ratio=2.1; 95% CI=0.8-5.5). Risk was greater in those with both of these indicators (odds ratio=8.1; 95% CI=2.7-23.9). There was some evidence that associations were stronger in older subjects. Exclusion of African-Caribbeans or cases with positive family history somewhat attenuated the association. Conclusions Indicators of social inequality at birth are associated with increased risk of adult-onset schizophrenia, suggesting that environmental factors are important determinants of schizophrenic disorders.
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