Prompted by previous reports of substantial clinical improvement in most schizophrenic patients given hemodialysis for their psychiatric condition, we studied the efficacy of hemodialysis in 15 schizophrenic outpatients, under double-blind, controlled conditions. The patients were randomly assigned to either a real-sham or sham-real sequence of dialysis treatment. Results of repeated measurement and other analyses of data on symptoms and behavior that were collected before study treatment, at crossover, and at the end of treatment revealed no difference between the effects of real and sham dialysis. These results provide important experimental evidence of the lack of therapeutic efficacy of hemodialysis in schizophrenia.
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