Relative difference among 27 functional measures in patients with knee osteoarthritis: an exploratory cross-sectional case-control study.

On average the patients had had pain for 11 years, had been diagnosed 10 years ago, and showed mostly small-to-moderate radiographic KOA (Table 1 ). Main results The ANCOVA sensitivity analysis indicated only small bi-directional changes in p -values after adjustment for age (Table 2 ) Thus, we refer to the results of the main analysis below. Highly significant group differences and very large effect sizes were found for (i) body function on Pain last week, KOOS-Symptoms, and KOOS-Pain; for (ii) activity on KOOS-Sport/Rec and KOOS-ADL; and for (iii) participation on KOOS-QoL and Örebro.

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