The online version of this article (doi:10.1186/s12891-015-0854-1) contains supplementary material, which is available to authorized users.
Dahe Li, J. Li and Weidong Xu contributed equally to this work.
The authors declare no conflict of interest. No benefits in any form have been received or will be received from a commercial party related directly or indirectly to the subject of this article. No funds were received in support of this study.
LD, HX and ZW contributed equally to this work as co-first authors. LD participated in translating English version of NKSS into Chinese and drafted the manuscript, HX and ZW was in charge of statistical analysis. WW and LD were in charge of collecting clinical data of patients. ZY was in charge of collecting radiology data and evaluating radiological change of knee. All authors read and approved the final manuscript.
The NKSS has recently been translated into Dutch version. The reliability and validity were also assessed. However, there is no Simplified Chinese version of New Society Knee Scoring System (SC-NKSS) for Chinese population.
The SC-NKSS was translated from the original English version following international guidelines. All patients undergoing total knee arthroplasty (TKA) between September 2012 and September 2013 were invited to participate in this study. Finally, a total of 105 did so. Patients (preoperative and postoperative) completed the Chinese version of NKSS, Oxford Knee Score (OKS), the Medical Outcomes General Health Survey (SF-36) and Visual analog scale (VAS). Psychometric testing of reliability, construct validity, content validity were conducted.
All the 105 participants completed the questionnaires and no floor or ceiling effects were checked. Internal consistency was excellent with Cronbach’s alpha coefficient ranging from 0.71 to 0.85. Test-retest reliability was satisfactory with an intraclass correlation coefficient of 0.92 (95%confidence interval, 0.86–0.95). Construct validity was demonstrated to correlate well with the Chinese version of OKS (r =−0.78; p < 0.01), VAS (r =−0.70; p < 0.01), Physical Function (PF) (r = 0.74; p < 0.01), Body Pain (BP) (r = 0.63; p < 0.01) and General Health (GH) (r = 0.51; p < 0.01) of SF-36 domains.
The SC-NKSS was well accepted and demonstrated acceptable psychometric properties in mainland China.
Additional file 1: Simplified Chinese version of SC-NKSS. (PDF 584 kb)12891_2015_854_MOESM1_ESM.pdf
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- Translation and validation of the simplified Chinese new Knee Society Scoring System
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