Vol.:(0123456789) 1 3 Knee Surgery, Sports Traumatology, Arthroscopy https://doi.org/10.1007/s00167-020-06211-1 KNEE Cross‑cultural validation of Hindi version Knee Injury and Osteoarthritis Outcome Score (KOOS) in osteoarthritis knee Ranjan Kumar Jha 1  · Ramesh Kumar Sen 2  · Sujit Kumar Tripathy 3  · Nirmal Raj Gopinathan 1  · Tarun Goyal 4  · Suresh Kumar Sharma 5 Received: 12 June 2020 / Accepted: 3 August 2020 © European Society of Sports Traumatology, Knee Surgery, Arthroscopy (ESSKA) 2020 Abstract Purpose To assess the reliability, validity and responsiveness of the Hindi version of the Knee Injury and Osteoarthritis Outcome Score (H-KOOS) in osteoarthritic knee. Methods Two hundred and fourteen patients of osteoarthritis knee (OA) between 40 and 80 years of age were evaluated with H-KOOS, Short form health survey (SF12v2) and the WHOQOL-BREF questionnaire. The H-KOOS was re-evaluated after 48 h in 125 patients to assess the test–retest reliability. For responsiveness, 40 patients were treated with the intra-articular hyaluronic acid injection, and the efect was assessed after 6 weeks. Results Most of the domains in H-KOOS did not show a ceiling efect. The foor values were observed in 3.75% of patients in sports/recreation function and 2.75% of patients in Quality of life (QoL). The test–retest reliability was excellent with the Intraclass-Correlation-Coefcient (ICC) ranging from 0.89 to 0.94. Internal consistency as assessed using Cronbach‘s alpha coefcient was acceptable for pain, activities of daily living (ADL) and sport/recreation function (range 0.86–0.93); however, symptoms and QoL had weak internal consistency. There were moderate to strong correlations (r = 0.35 to 0.6) between domains measuring similar constructs in H-KOOS, SF12v2 and WHOQOL-BREF indicating good convergent construct validity. The responsiveness as measured by the efect size (ES) and standardized response mean (SRM) was large for pain (ES 0.9, SRM 0.8), moderate for Sport/Rec (ES 0.66, SRM 0.2) and small for ADL, QoL and Symptoms subscales. Conclusion The Hindi version KOOS is a valid, reliable and responsive measure to evaluate osteoarthritis knee with minimal ceiling and foor efects. Level of evidence Prospective cohort study, level II. Keywords KOOS · Knee injury · Knee osteoarthritis · Measurement properties · Patient-reported outcome measures · Psychometrics Introduction Recently, patient-reported outcome measures have been considered as one of the appropriate assessment methods to evaluate the hip and knee function in arthritic conditions, both before and after treatment [8]. Before the widespread clinical and research use of such outcome scale in a com- munity, it should be rigorously tested for validity, reliability and responsiveness [1, 8]. The Knee Injury and Osteoarthritis Outcome Score (KOOS) questionnaire is such a patient-reported outcome measure for knee assessment in osteoarthritis and traumatic conditions [9, 18]. The details of the KOOS were published for the frst time in 1998, and since then, the psychometric properties of KOOS have been evaluated in many studies Electronic supplementary material The online version of this article (https://doi.org/10.1007/s00167-020-06211-1) contains supplementary material, which is available to authorized users. * Sujit Kumar Tripathy sujitortho@yahoo.in; sujitortho@aiimsbhubaneswar.edu.in 1 Department of Orthopaedics, Postgraduate Institute of Medical Education and Research, Chandigarh, India 2 Max Hospital, Mohali, Chandigarh, India 3 Department of Orthopaedics, AIIMS, Bhubaneswar, India 4 Department of Orthopaedics, AIIMS, Bhathinda, India 5 Department of Biostatistics, Punjab University, Chandigarh, India