Mind-Body Therapies for Opioid-Treated Pain: A Systematic Review and Meta-analysis

Abstract

Importance: Mind-body therapies (MBTs) are emerging as potential tools for addressing the opioid crisis. Knowing whether mind-body therapies may benefit patients treated with opioids for acute, procedural, and chronic pain conditions may be useful for prescribers, payers, policy makers, and patients.

Objective: To evaluate the association of MBTs with pain and opioid dose reduction in a diverse adult population with clinical pain.

Data sources: For this systematic review and meta-analysis, the MEDLINE, Embase, Emcare, CINAHL, PsycINFO, and Cochrane Library databases were searched for English-language randomized clinical trials and systematic reviews from date of inception to March 2018. Search logic included (pain OR analgesia OR opioids) AND mind-body therapies. The gray literature, ClinicalTrials.gov, and relevant bibliographies were also searched.

Study selection: Randomized clinical trials that evaluated the use of MBTs for symptom management in adults also prescribed opioids for clinical pain.

Data extraction and synthesis: Independent reviewers screened citations, extracted data, and assessed risk of bias. Meta-analyses were conducted using standardized mean differences in pain and opioid dose to obtain aggregate estimates of effect size with 95% CIs.

Main outcomes and measures: The primary outcome was pain intensity. The secondary outcomes were opioid dose, opioid misuse, opioid craving, disability, or function.

Results: Of 4212 citations reviewed, 60 reports with 6404 participants were included in the meta-analysis. Overall, MBTs were associated with pain reduction (Cohen d = -0.51; 95% CI, -0.76 to -0.26) and reduced opioid dose (Cohen d = -0.26; 95% CI, -0.44 to -0.08). Studies tested meditation (n = 5), hypnosis (n = 25), relaxation (n = 14), guided imagery (n = 7), therapeutic suggestion (n = 6), and cognitive behavioral therapy (n = 7) interventions. Moderate to large effect size improvements in pain outcomes were found for meditation (Cohen d = -0.70), hypnosis (Cohen d = -0.54), suggestion (Cohen d = -0.68), and cognitive behavioral therapy (Cohen d = -0.43) but not for other MBTs. Although most meditation (n = 4 [80%]), cognitive-behavioral therapy (n = 4 [57%]), and hypnosis (n = 12 [63%]) studies found improved opioid-related outcomes, fewer studies of suggestion, guided imagery, and relaxation reported such improvements. Most MBT studies used active or placebo controls and were judged to be at low risk of bias.

Conclusions and relevance: The findings suggest that MBTs are associated with moderate improvements in pain and small reductions in opioid dose and may be associated with therapeutic benefits for opioid-related problems, such as opioid craving and misuse. Future studies should carefully quantify opioid dosing variables to determine the association of mind-body therapies with opioid-related outcomes.

Figure 1.. Preferred Reporting Items for Systematic Review and Meta-analysis Flow Diagram of Literature Search and Study Inclusion

Figure 2.. Summary of Studies Examining the Association of Mind-Body Therapies With Pain and Opioid Use

Squares indicate point estimates, with the size of the squares indicating weight. Horizontal lines indicate 95% CIs. The diamond indicates the pooled effect estimate with the tips of the diamond indicating the 95% CI. MBT indicates mind-body therapy.

Figure 3.. Risk of Bias

Present review authors' judgments about each risk of bias item presented as percentages across all included studies.