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Q Does gender, age, ethnicity, and/or place of residence affect the incidence of schizophrenia and other psychotic disorders?
METHODS
Design:
Longitudinal study.
Follow up period:
Two years (Nottingham and London), nine months (Bristol).
Setting:
Three study centres in South East London, Nottingham, and Bristol, UK; case ascertainment 1997–99.
People:
1 030 266 people (1 631 441 person years) aged 16–64 years resident in the study areas (UK 2001 census data).
Risk factors:
Gender, age, ethnicity, area of residence. Ethnicity was determined by self-report, place of birth, and parents’ place of birth.
Outcomes:
Incidence of schizophrenia or other psychoses (DSM-IV). All people making contact with psychiatric services for the first time who had symptoms or clinical suspicion of psychosis and no organic medical cause were screened using the World …
Footnotes
For correspondence: James B Kirkbride, MSc, Department of Psychiatry, University of Cambridge, Addenbrooke’s Hospital, Hills Road, Cambridge CB2 2QQ, UK; jbk25{at}cam.ac.uk
Sources of funding: Medical Research Council, UK and Stanley Medical Research Institute, USA.
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