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Acceptance and Commitment Therapy (ACT) for Chronic Pain: A Systematic Review and Meta-Analyses

Hughes, Laura S. MSc*; Clark, Jodi MSc; Colclough, Janette A. MA; Dale, Elizabeth; McMillan, Dean PhD§

The Clinical Journal of Pain: June 2017 - Volume 33 - Issue 6 - p 552–568
doi: 10.1097/AJP.0000000000000425
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Objectives: Chronic pain places a burden on individuals and the economy. Although there is evidence for the effectiveness of cognitive-behavior therapy, it is recognized that the effects are limited. Acceptance and Commitment Therapy (ACT), which aims to increase valued action in the presence of pain, has been suggested as an alternative approach. The objective of this review was to determine the clinical effectiveness of ACT for chronic pain in adults when compared with control conditions and other active treatments.

Methods: The searches of this systematic review were conducted in the Cochrane library, MEDLINE, EMBASE, CINAHL Plus (EBSCO), and PsycINFO. Grey literature, reference list, and reverse citation searches were also completed.

Results: Eleven trials were included. ACT was favored over controls (no alternative intervention or treatment as usual). Significant, medium to large effect sizes were found for measures of pain acceptance and psychological flexibility, which are typically considered processes of ACT. Significant small to medium effect sizes were found for measures of functioning, anxiety, and depression. Measures of pain intensity and quality of life were not significantly different than zero. Generally effect sizes were smaller at follow-up.

Discussion: ACT was more clinically effective than controls on a number of outcomes. It is possible that methodological limitations, some of which are common to psychological trials, may have led to overestimated effects. Only a few studies compared ACT to active treatments and while the evidence is promising for ACT in the treatment of chronic pain, further methodologically robust trials are required.

Supplemental Digital Content is available in the text.

*Leeds CAMHS, Leeds Community Healthcare NHS Trust, Leeds

IAPT Adult Mental Health Services; Tees, Esk and Wear Valleys NHS Foundation Trust

The University of York

§Department of Health Sciences and Hull York Medical School, The University of York, York, UK

The authors declare no conflict of interest.

Reprints: Laura S. Hughes, MSc, Leeds CAMHS, Kirkstall Health Centre, 15 Morris Lane, Kirkstall, Leeds, LS5 3DB, UK (e-mail: laurahughes.wppp@gmail.com).

Received September 14, 2015

Received in revised form November 8, 2016

Accepted July 21, 2016

Copyright © 2017 Wolters Kluwer Health, Inc. All rights reserved.