To the Editor: The randomised controlled trial recently reported by Blashki and colleagues does not support their hypothesis.1 The drop-out rates in both arms of the trial were very high — only 62% of general practitioners in the intervention group and 54% in the control group completed the trial. One cannot have any confidence in their conclusion that a short training course can improve GP skills in the provision of cognitive behavioural strategies (CBS). For example, what if the 38% of GPs in the intervention group who dropped out actually deteriorated in their CBS skills and therefore declined to be videotaped?
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