Hypnosis as an adjunct to cognitive-behavioural psychotherapy: a meta-analysis

CRD COMMENTARY: The review, consisting of two studies (see Other Publications of Related Interest nos 1 and 2), lacks many of the elements of a good quality systematic review. Outcome measures, participant characteristics, validity criteria, and the methods by which decisions of relevance, judgements of validity and processes of data extraction are made are not included within the review. The details of the included primary studies are not provided clearly or in sufficient detail. Another meta-analysis of the obesity data (Allison and Faith, see Other Publications of Related Interest no 1; DARE record no. 11997008373) has provided a different interpretation of the pooled effect size.