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Meta-Analysis
. 2008 Sep 15;59(9):1221-8.
doi: 10.1002/art.24010.

Effect of therapeutic exercise for hip osteoarthritis pain: results of a meta-analysis

Gabriela Hernández-Molina  1 , Stephan Reichenbach, Bin Zhang, Michael Lavalley, David T Felson
Affiliations
Meta-Analysis

Effect of therapeutic exercise for hip osteoarthritis pain: results of a meta-analysis

Gabriela Hernández-Molina et al. Arthritis Rheum. .

Abstract

Objective: Recommendations for lower extremity osteoarthritis (OA) and exercise have been primarily based on knee studies. To provide more targeted recommendations for the hip, we gathered evidence for the efficacy of exercise for hip OA from randomized controlled trials.

Methods: A bibliographic search identified trials that were randomized, controlled, completed by >or=60% of subjects, and involved an exercise group (strengthening and/or aerobic) versus a non exercise control group for pain relief in hip OA. Two reviewers independently performed the data extraction and contacted the authors when necessary. Effect sizes (ES) of treatment versus control and the I(2) statistic to assess heterogeneity across trials were calculated. Trial data were combined using a random-effects meta-analysis.

Results: Nine trials met the inclusion criteria (1,234 subjects), 7 of which combined hip and knee OA; therefore, we contacted the authors who provided the data on hip OA patients. In comparing exercise treatment versus control, we found a beneficial effect of exercise with an ES of -0.38 (95% confidence interval [95% CI] -0.68, -0.08; P = 0.01), but with high heterogeneity (I(2) = 75%) among trials. Heterogeneity was caused by 1 trial consisting of an exercise intervention that was not administered in person. Removing this study left 8 trials (n = 493) with similar exercise strategy (specialized hands-on exercise training, all of which included at least some element of muscle strengthening), and demonstrated exercise benefit with an ES of -0.46 (95% CI -0.64, -0.28; P < 0.0001).

Conclusion: Therapeutic exercise, especially with an element of strengthening, is an efficacious treatment for hip OA.

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Figures

Figure 1
Figure 1
Flow diagram of study selection. OA = osteoarthritis; RCT = randomized controlled trial.
Figure 2
Figure 2
A, Forest plot of hip osteoarthritis (OA) data (patients may have coexistent knee OA). B, Forest plot of hip as the index joint with OA.
See this image and copyright information in PMC

Comment in

References

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