Translation and Validation of the Dutch New Knee Society Scoring System©

Abstract

Background A new version of The Knee Society Knee Scoring System Ó (KSS) has recently been developed. Before this scale can be used in non-English-speaking populations, it has to be translated and validated for a particular population. Questions/purposes We evaluated the construct and content validity, the test-retest reliability, and the internal consistency of the Dutch version of the New Knee Society KSS. Methods A Dutch translation was performed using a forward-backward translation protocol. We tested the construct validity of the Dutch New KSS by comparing it with the Dutch versions of the WOMAC, Knee Injury and Osteoarthritis Outcome Score (KOOS), and SF-12 scores in 137 patients undergoing total knee arthroplasty (TKA). Content validity was assessed by comparing pre-and postoperative scores and by checking floor and ceiling effects. To evaluate test-retest reliability and consistency, 47 patients completed the questionnaire a second time with a mean of 8 days interval (range, 2-20 days) between tests. Results Construct validity was demonstrated because the Dutch New KSS correlated well with the Dutch WOMAC (r = À0.751; p \ 0.001), Dutch KOOS (r = À0.723; p \ 0.001), and Dutch SF-12 (r = 0.569; p \ 0.001). There was a significant difference between pre-and postoperative scores (p \ 0.001) in line with the other scores. Test-retest reliability proved excellent with an intraclass correlation coefficient between 0.73 and 0.92 depending on the domain tested. Consistency as indicated by Cronbach's alpha ranging from 0.84 to 0.96 was good to excellent. Conclusions As demonstrated by the validation procedure, the Dutch New KSS is an excellent instrument to evaluate TKA outcome in Dutch-speaking patients.

Crosscultural Adaptation and Validation of the Korean Version of the New Knee Society Knee Scoring System

“…Therefore, the activity The expectation domain showed a similar correlation with the physical function and general health subscales of the Korean SF-36. Our study shows low levels of correlation when compared with the Dutch [22] and French studies [6] but similar correlations when compared with the Japanese version of the 2011 KS Score [10]. A possible explanation for this finding could be the difference in cultural background between the European and Asian populations.…”

“…The current study was conducted to develop the Korean version of the 2011 KS Score for Korean-speaking patients who undergo TKA, which was developed through crosscultural adaptation, and to investigate its psychometric properties. Similar versions of the 2011 KS Score have been translated to Japanese [10], French [6], Dutch [22], and Chinese [16] .). We acknowledge certain limitations of our study.…”

Cross-cultural adaptation and validation of the Japanese version of the new Knee Society Scoring System for osteoarthritic knee with total knee arthroplasty

“…Several scoring systems in Japanese are available for assessing knee ailments, some of which have been validated in a scientific manner such as the Japanese Knee Osteoarthritis Measure, the Knee Injury and Osteoarthritis Outcome Score, and OKS [2][3][4]. The new KSS has been translated into Dutch and French so far [8,14]. This is why the new KSS, developed in the USA [5,6], has been translated into other languages [8,14].…”

Knee Osteoarthritis: Does Transcutaneous Electrical Nerve Stimulation Work?

“…The KSS is an objective and subjective tool for rating patients' knee and functional abilities. 16 The KSSs were reported as objective and functional scores. The LEFS is a self-reported assessment of physical function for patients with OA, and subjec-tively allows patients to score their ability to perform certain activities.…”