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Table 4 Mean KOOS scores (0 to 100, worst to best scale), before anterior cruciate ligament reconstruction (ACLR) and at one-year follow-up (N = 72)

From: Cross-cultural translation and measurement properties of the Polish version of the Knee injury and Osteoarthritis Outcome Score (KOOS) following anterior cruciate ligament reconstruction

KOOS subscales Before ACLR mean (SD) 1yr follow-up mean (SD) P Effect size Standardized response mean
Pain 80.6 (16.0) 88.1 (13.4) <0.001 0.41 0.39
Symptoms 74.6 (18.0) 81.9 (16.9) 0.002 0.47 0.49
ADL 84.0 (15.3) 92.1 (12.1) <0.001 0.53 0.58
Sports/Rec 48.4 (26.9) 72.0 (24.9) <0.001 0.88 0.80
QOL 39.0 (18.0) 63.8 (23.1) <0.001 1.38 1.08
  1. Responsiveness is given as effect sizes and standardized response means for all KOOS subscales.
  2. ADL Activities of daily living, QOL Quality of life. Responsiveness is given as effect size and standardized response mean. Wilcoxon signed rank test was used for comparison of KOOS subscales’ scores before ACLR and at follow-up. KOOS is 0-100 points, worst to best.