OTHER
Therapeutics
Review: limited evidence that adding a second antipsychotic improves clozapine treatment in schizophrenia
| The first 150 words of the full text of this article appear below. |
What is the effect of adding antipsychotics to clozapine in people with schizophrenia? Does absence of double blindness exaggerate estimates of treatment effect?
Standardised mean difference of group mean changes in the Positive and Negative Symptoms Scale or the Brief Psychiatric Rating Scale score, either from baseline to endpoint or at the end of the trial; treatment failure, defined as the proportion of people with no clinically significant response in global state.
Systematic review with meta-analysis.
Cochrane Schizophrenia Group Trials Register, MEDLINE and EMBASE were searched from inception to November 2007 for randomised controlled trials (RCTs). Reference lists of identified studies were hand searched.
Two reviewers appraised studies and selected RCTs comparing clozapine plus placebo or clozapine alone with clozapine plus another antipsychotic in adults (aged 18 years and over) with a diagnosis of schizophrenia or related disorders. There were no language restrictions. Participants had psychotic symptoms that had
National Psychosis Unit, Bethlem Royal Hospital, South London and Maudsley NHS Foundation Trust, London, UK
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