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

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)

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

Responsiveness is given as effect sizes and standardized response means for all KOOS subscales.
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.

ISSN: 1477-7525