An Indonesian Version of Validity and Reliability Test of Knee Outcome Survey - Activities of Daily Living Scale in Knee Osteoarthritis ABSTRACT Introduction: Knee osteoarthritis (OA) symptoms greatly limit daily activities and cause functional disability

Introduction: Knee osteoarthritis (OA) symptoms greatly limit daily activities and cause functional disability, also limit participation and reduce quality of life. It is necessary to evaluate patients’ perspectives on clinical outcomes regarding the quality and success of knee OA management. The Knee Outcome Survey – Activities of Daily Living Scale (KOS-ADLS) is an instrument to assess these perspectives. This study tests the validity and reliability of a KOS-ADLS translation.
Methods: This study is a cross-sectional study involving 65 subjects and was conducted at the Musculoskeletal Division, Department of Physical Medicine and Rehabilitation, Cipto Mangunkusumo Hospital from 01/10/2020 to 31/08/2021. The results of the Indonesia translation of KOS-ADLS (KOS-ADLS-Ina) were tested for validity using Pearson correlation with p<0.05 and r>0.3 and the reliability was tested with internal consistency of α-Cronbach and Intraclass Correlation Coefficient ≥ 0.7.
Results: The correlation value for the total items was 0.461–0.792. As for the internal consistency, the α-Cronbach set at 0.911 and ICC was 0.969 (0.950–0.981). KOS-ADLS-Ina proves that both Pearson’s correlation and internal consistency have values above the minimal intended value with a significance of p<0.05.
Conclusion: KOS-ADLS-Ina proves to be a valid and reliable functional capacity instrument to be used in Indonesian population