Efficacy of Hypnosis in Adults Undergoing Surgical Procedures: A meta-analytic update.

In this meta-analysis we updated a review from 2013 investigating the evidence on the efficacy of hypnosis in adults undergoing surgical procedures compared to standard care alone or an attention control. A comprehensive literature search using Medline, CENTRAL, Web of Science, PsycINFO, ProQuest Dissertations and Theses database, and manual searches were conducted to identify randomized controlled trials. In this update, N = 23 eligible studies were added to the existing study pool, resulting in N = 50 studies with 4269 patients.