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JOURNAL ARTICLE

Clinic-Based Patellar Mobilization Therapy for Knee Osteoarthritis: A Randomized Clinical Trial

Regina Wing Shan Sit, Keith Kwok Wai Chan, Dan Zou, Dicken Cheong Chun Chan, Benjamin Hon Kei Yip, Daisy Dexing Zhang, Ying Ho Chan, Vincent Chi Ho Chung, Kenneth Dean Reeves, Samuel Yeung Shan Wong
Annals of Family Medicine 2018, 16 (6): 521-529
30420367

PURPOSE: We performed a phase 2 randomized clinical trial to evaluate the preliminary effectiveness of a clinic-based patellar mobilization therapy (PMT) in patients with knee osteoarthritis.

METHODS: We recruited 208 patients with knee osteoarthritis at primary care clinics in Hong Kong. Patients were randomly assigned (1:1) to the intervention group or the control group. The intervention group received 3 PMT treatment sessions from primary care physicians at 2-month intervals, with concomitant prescription of a home-based vastus medialis oblique muscle exercise. The control group received PMT after the study period. The primary outcome was the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) pain score. Secondary outcomes included the WOMAC composite, function, and stiffness scores; the visual analog scale score for pain; objective physical function tests (30-s chair stand, 40-m walk test, timed up and go test, and EuroQol-5D). All outcomes were evaluated at baseline and at 24 weeks through intention-to-treat analysis.

RESULTS: We observed no baseline between-group differences. The WOMAC pain score showed greater improvement in the intervention group than in the control group at 24 weeks (between-group difference - 15.6, 95% CI, - 20.5 to - 10.7, P <.001). All secondary outcomes also demonstrated significant between-group differences.

CONCLUSIONS: Patellar mobilization therapy has the potential to reduce pain and improve function and quality of life for patients with knee osteoarthritis. Future clinical trials with comparison to other active comparator controls will help determine the overall efficacy and facilitate the deployment of PMT in real-world practice.

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