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Risperidone reduced the risk of relapse in outpatient schizophrenia and schizoaffective disorder
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QUESTION: In outpatients with schizophrenia or schizoaffective disorder, is risperidone more effective than haloperidol for reducing the risk of relapse?

Design

Randomised {allocation concealed*}, blinded {patients and clinicians},* controlled trial with follow up to time of treatment discontinuation (Risperidone-USA-79 Study).

Setting

40 sites in the US.

Patients

397 patients who were 18–65 years of age, had a diagnosis of schizophrenia or schizoaffective disorder according to DSM-IV criteria, had required intensive psychiatric treatment within 24 months before study entry, had received a stable dose of antipsychotic medication for ≥30 days before study entry, had resided at the same address for ≥30 days before study entry, and were judged clinically stable by the principal investigator. Exclusion criteria included another current …

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