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Violent victimisation is more common among people with schizophrenia-spectrum disorders than among the general population

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Question: Do rates of recorded violent and non-violent victimisation differ among people with schizophrenia-spectrum disorders compared with the general population and have recorded rates changed over a 30-year period?

Population: 4168 adults diagnosed with schizophrenia-spectrum disorders (cases) were matched by age and year of birth to 4641 adults without schizophrenia-spectrum disorders randomly selected from the community (controls). Participants were aged 17–65 years. Cases were identified from a state-wide public mental health register comprising all people first diagnosed with a schizophrenia illness in the years 1975, 1980, 1985, 1990, 1995, 200 and 2005. Community controls were gathered from a representative electoral roll.

Setting: Victoria, Australia; 1975–2005.

Assessment: Recorded diagnoses were made by psychiatrists at the time of patient discharge from community, outpatient and inpatient services and coded using International Classification of Diseases (ICD) criteria as any diagnosis of schizophrenia, schizoaffective disorder, paraphrenia, shared psychotic disorder, delusional disorder or unspecified non-organic psychosis. Diagnoses were only included if they were supported in 75% of subsequent diagnoses if there was a clear diagnostic progression indicative of schizophrenia-spectrum disorders. Rates of victimisation …

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