To perform validation of the Romanian Knee disability and Osteoarthritis Outcome Score for Joint Replacement (KOOSJR).
Ninety-six patients (101 knees) with advanced osteoarthritis (OA) scheduled for total knee replacement completed Romanian translations of KOOSJR and IKDC (International Knee Documentation Committee - subjective knee form) and Euroqol EQ-5D-5 L, and the treating physician completed the original knee society score (KSS).
Average age was 66.4 (range 50-83) years and male to female ratio 1:3.76. There was moderate correlation between the test-retest (average 4 days) KOOSJR (r = 0.618, n = 45) and IKDC (r = - 0.671, n = 99), weak between KOOSJR and EQ-5D-5 L Index (r = - 0.431, n = 100) and VAS (r = - 0.364, n = 99) and very weak to KSS score (r = - 0.133, n = 98) and function (r = - 0.072, n = 97) For the first KOOSJR, Cronbach's alpha was 0.816 and intraclass correlation coefficient (ICC) 0.816 (95% CI 0.755-0.866) for average measures. For the retest, Cronbach's alpha was 0.841 (95% CI 0.760-0.903) for averages.
The Romanian Knee disability and Osteoarthritis Outcome Score for Joint Replacement (KOOSJR) is a valid, reliable, consistent and reproducible clinical score for patients with OA requiring arthroplasty.