Are the results of open randomised controlled trials comparing antipsychotic drugs in schizophrenia biased? Exploratory meta- and subgroup analysis.

21 , 40 participants) showed a trend of risperidone being associated with less weight gain than haloperidol (1.74 kg [−0.62; 4.10], test for subgroup differences: Chi2 = 5.07, d f = 1, p = 0.02).

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