Minimum clinically significant change in the Japanese version of the Lower Extremity Functional Scale in patients with knee osteoarthritis

Abstract

 In patients with knee osteoarthritis (OA), the minimum clinically important change (MCID) in the score on the Lower Extremity Functional Scale-Japanese Version (LEFS) after 3 months of exercise therapy was analyzed. The MCID in the score on LEFS calculated in 127 patients with knee OA was 5.2 (effect size, 0.44). Thus, the effect size of the MCID in the score on LEFS was small and further investigation is warranted.