Previous systematic reviews have investigated musicand its role in specific surgical procedures, such ascolonoscopy,15,16 or in only one aspect of patient experiencein isolation, such as preoperative anxiety17 or postoperativepain.18,19 Cepeda and colleagues20 investigated use ofmusic for pain relief in both surgical and non-surgicalsettings. Nilsson21 comprehensively reviewed 60 articlesabout use of music in the perioperative period but didnot do a meta-analysis.21 No previous reports haveprovided a comprehensive overview with meta-analysesand meta-regression.