Cross-cultural adaptation and measurement properties of the Persian version of the Modified Cincinnati Knee Rating System (MCKRS)

Abstract

Background The Modified Cincinnati Knee Rating system (MCKRS), a brief 8-item subjective survey which provides information on the symptom and functional limitations induced by daily activities and sports and assesses patient’s satisfaction. Purpose to examine cross-sectional adaptation and validation of the Persian translation of modified CKRS. Methods Original MCKRS was translated to Persian forward and backward according to international standard guidelines. We utilized Cronbach’s alpha test, and the spearman ρ coefficient for test-retest reliability. we assessed reliability of questionnaire using Cronbach’s alpha and the spearman ρ coefficient, for test-retest reliability. A total of 101 patients completed Persian version of MKCRS and other relevant scales including: HSS-ACL satisfaction, visual analogue scale (VAS), Tegner activity score (TAS), Cincinnati and Lysholm scores. Results using Persian version of modified version of CKRS, the internal consistency (Cronbach’s alpha) was 0.9 (if item deleted: 0.81–0.86); the construct validity (Pearson’s r) varied between − 0.50 (for VAS pain) and 0.79 (for Lysholm); the reliability (intraclass correlation coefficient) varied between 0.82–0.97; in addition, no ceiling or floor effect was present. Conclusion The Persian Modified Cincinnati knee rating system has adequate measurement properties and is considered a valid and reliable instrument which can identify clinical outcomes after ACLR surgery

Anterior cruciate ligament—Return to sport after injury scale brief version after ACL reconstruction: Persian translation, cross‐cultural adaptation and validation

“…In order to adequately assess the construct validity, repeatability, ceiling and floor effects and internal consistency, it was necessary to have a sample size of at least 100 patients, as recommended by Terwee et al [ 23 , 38 ]. The analysis comprised a total of 102 participants who were requested to complete pain and satisfaction evaluations, including the single assessment numeric evaluation (SANE) and the visual analogue scale (VAS), along with the validated editions of the Lysholm, Cincinnati Knee Rating System (CKRS) [ 21 ], Tegner activity scale (TAS) and visual analogue scale (VAS).…”