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Are Invasive Procedures Effective for Chronic Pain? A Systematic Review.


ABSTRACT:

Objective

To assess the evidence for the safety and efficacy of invasive procedures for reducing chronic pain and improving function and health-related quality of life compared with sham (placebo) procedures.

Design

Systematic review with meta-analysis.

Methods

Studies were identified by searching multiple electronic databases, examining reference lists, and communicating with experts. Randomized controlled trials comparing invasive procedures with identical but otherwise sham procedures for chronic pain conditions were selected. Three authors independently extracted and described study characteristics and assessed Cochrane risk of bias. Two subsets of data on back and knee pain, respectively, were pooled using random-effects meta-analysis. Overall quality of the literature was assessed through Grading of Recommendations, Assessment, Development, and Evaluation.

Results

Twenty-five trials (2,000 participants) were included in the review assessing the effect of invasive procedures over sham. Conditions included low back (N?=?7 trials), arthritis (4), angina (4), abdominal pain (3), endometriosis (3), biliary colic (2), and migraine (2). Thirteen trials (52%) reported an adequate concealment of allocation. Fourteen studies (56%) reported on adverse events. Of these, the risk of any adverse event was significantly higher for invasive procedures (12%) than sham procedures (4%; risk difference = 0.05, 95% confidence interval [CI] = 0.01 to 0.09, P?=?0.01, I2 = 65%). In the two meta-analysis subsets, the standardized mean difference for reduction of low back pain in seven studies (N?=?445) was 0.18 (95% CI = -0.14 to 0.51, P?=?0.26, I2 = 62%), and for knee pain in three studies (N?=?496) it was 0.04 (95% CI = -0.11 to 0.19, P?=?0.63, I2 = 36%). The relative contribution of within-group improvement in sham treatments accounted for 87% of the effect compared with active treatment across all conditions.

Conclusions

There is little evidence for the specific efficacy beyond sham for invasive procedures in chronic pain. A moderate amount of evidence does not support the use of invasive procedures as compared with sham procedures for patients with chronic back or knee pain. Given their high cost and safety concerns, more rigorous studies are required before invasive procedures are routinely used for patients with chronic pain.

SUBMITTER: Jonas WB 

PROVIDER: S-EPMC6611529 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature

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Publications

Are Invasive Procedures Effective for Chronic Pain? A Systematic Review.

Jonas Wayne B WB   Crawford Cindy C   Colloca Luana L   Kriston Levente L   Linde Klaus K   Moseley Bruce B   Meissner Karin K  

Pain medicine (Malden, Mass.) 20190701 7


<h4>Objective</h4>To assess the evidence for the safety and efficacy of invasive procedures for reducing chronic pain and improving function and health-related quality of life compared with sham (placebo) procedures.<h4>Design</h4>Systematic review with meta-analysis.<h4>Methods</h4>Studies were identified by searching multiple electronic databases, examining reference lists, and communicating with experts. Randomized controlled trials comparing invasive procedures with identical but otherwise s  ...[more]

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