Skip to main content

Table 2 Mean KOOS scores (0 to 100, worst to best scale) at test and retest administrations one week apart, test-retest reliability, internal consistency and minimal detectable change of KOOS subscales for individuals and groups 1.3 year after anterior cruciate ligament reconstruction (ACLR)

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 (number of items) Mean KOOS score (SD) ICC (95% CI) Cronbach’s alpha coefficients SEM Minimal detectable change (95% CI) in individuals Minimal detectable change (95% CI) in groups
First follow-up assessment Second follow-up assessment
ACLR, n = 72        
Pain (9) 88.1 (13.4) 87. 7 (13.9) 0.86 (0.84–0.88) 0.92 5.1 (4.6–5.4) 14.1 (12.9–14.9) 1.7 (1.6–1.8)
Symptoms (7) 81.9 (16.9) 82.2 (16.4) 0.90 (0.89–0.92) 0.95 5.2 (4.8–5.6) 14.5 (13.3–15.6) 1.7 (1.5–1.8)
ADL (17) 92.1 (12.1) 92.1 (11.9) 0.89 (0.88–0.91) 0.94 3.9 (3.6–4.2) 10.9 (10.1–11.6) 1.3 (1.2–1.4)
Sports/Rec (5) 72.0 (24. 9) 71.5 (26.2) 0.93 (0.91–0.94) 0.96 6.8 (6.1–7.5) 18.8 (16.9–20.7) 2.2 (2.0–2.4)
QOL (4) 63.8 (23.1) 65.4 (22.4) 0.90 (0.88–0.92) 0.95 7.3 (6.5–8.0) 20.2 (18.1–22.2) 2.4 (2.1–2.6)
  1. Abbreviations: ICC Intraclass correlation coefficient, SEM Standard error of measurement, ADL Activities of daily living, QOL Quality of life.