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Patient-reported outcome measures (mean ± 95% confidence interval) at baseline, 6 months, 1 year, and 2 years. A Wilcoxon signed rank test pairwise comparison of baseline to each visit revealed a P value of <.001 for all outcome measures. (ADL, activities of daily living; IKDC, International Knee Documentation Committee Knee evaluation; KOOS, Knee injury and Osteoarthritis Outcome Score; QOL, quality of life.)
