Magnetic Resonance Imaging-Assessed Vastus Medialis Muscle Fat Content and Risk for Knee Osteoarthritis Progression: Relevance From a Clinical Trial

Arthritis Care & Research
Jean-Pierre RaynauldJohanne Martel-Pelletier

Abstract

Studies have proposed vastus medialis (VM) muscle cross-sectional area change as a variable associated with cartilage volume loss in knee osteoarthritis (OA). However, the VM also includes fat (%Fat), which may influence knee function. This study analyzed the VM area and %Fat data, separately and in combination, to predict symptoms, cartilage volume loss, and bone marrow lesion (BML) change in knee OA. This study included the according-to-protocol population (n = 143) of a 2-year knee OA randomized clinical trial having magnetic resonance imaging at baseline and 2 years. Correlations used multivariate analyses. Greater baseline value for VM area and %Fat were significantly associated with sex (male, area; female, %Fat), higher body mass index (BMI), and Western Ontario and McMaster Universities Osteoarthritis Index stiffness, function, and total scores (better, high area; worse, high %Fat). Moreover, a VM %Fat increase of 1% at 2 years was associated with worsening of cartilage volume loss in the global knee (P = 0.015) and some subregions (P ≤ 0.030), and with an increment of BML global score change (P < 0.001). A 1% decrease in VM area at 2 years was associated with worsening of knee pain score (P = 0.048). Importantly, the c...Continue Reading

References

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Citations

Oct 14, 2016·Nature Reviews. Disease Primers·Johanne Martel-PelletierJean-Pierre Pelletier
Oct 19, 2016·Current Opinion in Rheumatology·Win M OoDavid J Hunter

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