The percentage of clinical antidepressant trials using the LOCF method and the percentage of study subjects' data imputed by using LOCF increased many-fold during 1965-2004. Published reports of trials provided little information to allow readers to assess possible bias introduced by use of the LOCF method.

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Risperidone is a useful addition to the antipsychotic drug armamentarium, but it should be viewed as an atypical antipsychotic agent. It is reasonable to consider a trial of risperidone in treatment-resistant schizophrenic patients prior to the use of clozapine and as a first-line treatment for newly diagnosed patients with schizophrenia.