Randomized controlled trials in psychiatry. Part 1: methodology and critical evaluation

Objective: To introduce clinicians to the methodology and critical appraisal of randomized controlled trials (RCTs) in psychiatry. Method: The methodology of RCTs in psychiatry is discussed. Using a systematic approach to critical appraisal, a published RCT of treatments for severe depression is examined and evaluated. Results and Conclusions: The RCT appraised illustrates certain problematic areas in the methodology of trials in psychiatry. A detailed knowledge of methodology and critique of RCTs is essential in determining whether reported results will influence clinicians' practice.