PT - JOURNAL ARTICLE AU - Krisna Yuarno Phatama AU - Abdul Aziz AU - Muhammad Hilman Bimadi AU - I Gusti Ngurah Arga Aldrian Oktafandi AU - Felix Cendikiawan AU - Edi Mustamsir TI - Knee Injury and Osteoarthritis Outcome Score: Validity and Reliability of an Indonesian Version AID - 10.31486/toj.20.0088 DP - 2021 Mar 20 TA - Ochsner Journal PG - 63--67 VI - 21 IP - 1 4099 - http://www.ochsnerjournal.org/content/21/1/63.short 4100 - http://www.ochsnerjournal.org/content/21/1/63.full SO - Ochsner J2021 Mar 20; 21 AB - Background: The Knee injury and Osteoarthritis Outcome Score (KOOS) is a useful diagnostic tool to assess knee ligament injury and osteoarthritis, but no validated Indonesian version of the KOOS was available.Methods: We used the forward-backward translation protocol to develop the Indonesian version of the KOOS. The translated questionnaire was administered twice to 51 subjects diagnosed with a knee ligament injury and osteoarthritis. Validity of the questionnaire was assessed by analyzing the correlation between the score of each subscale and the overall score of the 36-Item Short Form Health Survey (SF-36) using the Pearson correlation coefficient. Reliability was measured by evaluating internal consistency (Cronbach α) and test-retest reliability (intraclass correlation coefficient).Results: For construct validity, moderate Pearson correlation coefficients were found between the KOOS subscales and the SF-36. Cronbach α was 0.84 to 0.97 for all subscales, indicating adequate internal consistency. The test-retest reliability was excellent, with intraclass correlation coefficients ranging from 0.91 to 0.99 for all subscales. No significant differences were found in the KOOS subscale responses between the first administration of the questionnaire and the second administration within 21 days.Conclusion: The Indonesian version of the KOOS was determined to be valid and reliable and is therefore an objective instrument for evaluating knee ligament injury and knee osteoarthritis in the Indonesian population.