Shen Z D, Yu H M, Wang J T, Shi G Y, Sun Y
Department of Traditional Chinese Medicine, the 2nd Affiliated Hospital of Harbin Medical University, Harbin 150081, China.
Zhonghua Yi Xue Za Zhi. 2019 Feb 19;99(7):537-541. doi: 10.3760/cma.j.issn.0376-2491.2019.07.012.
To modify Western Ontario and McMaster University Osteoarthritis Index (WOMAC) for more accurate evaluation of patients with knee osteoarthritis in China,and its reliability and validity were measured. The WOMAC was modified through reviewing relevant literatures and practical survey.Total of 120 patients were enrolled in this study. The subjects completed the WOMAC,the modified WOMAC and Medical Outcomes Study 36-item Short Form(SF-36), and 113 of the questionnaires were valid for analysis [27 males (23.9%), 86 females (76.1%), aged (59±10) years]. Intraclass correlation coefficient and Cronbach α reliability coefficient were used to analyze the modified WOMAC's reliability; exploratory factor analysis was adopted to analyze the validity of WOMAC and the modified WOMAC; Spearman rank correlation coefficient was used to make a correlation analysis among SF-36, WOMAC and the modified WOMAC. For the four dimensions: pain, stiffness, function and life quality in the modified WOMAC, the intraclass correlation coefficient values were 0.861-0.910 and Cronbach α values were 0.751-0.936. In the content validity analysis, the number of extracted common factors for the four dimensions: pain,stiffness,function and life quality in the modified WOMAC were 1,1,2 and 1 respectively. The total variance interpretation rate was 65.684%, 84.367%, 67.252% and 67.572%, respectively. In the construct validity analysis, 4 common factors were extracted for WOMAC and the modified WOMAC respectively. The total variance interpretation rate was 70.100% and 67.213%, respectively. Both WOMAC and the modified WOMAC had a significant correlation with SF-36. The modified WOMAC is more suitable for Chinese living habits, but it still needs to be further evaluated with larger samples.
为使西安大略和麦克马斯特大学骨关节炎指数（WOMAC）更准确地评估中国膝关节骨关节炎患者，对其进行修改并测量其信效度。通过查阅相关文献和实际调研对WOMAC进行修改。本研究共纳入120例患者。受试者完成了WOMAC、修改后的WOMAC和医学结局研究简表36项健康调查（SF - 36），其中113份问卷有效用于分析[男性27例（23.9%），女性86例（76.1%），年龄（59±10）岁]。采用组内相关系数和Cronbach α信度系数分析修改后WOMAC的信度；采用探索性因子分析分析WOMAC和修改后WOMAC的效度；采用Spearman等级相关系数对SF - 36、WOMAC和修改后WOMAC进行相关性分析。对于修改后WOMAC的疼痛、僵硬、功能和生活质量四个维度，组内相关系数值为0.861 - 0.910，Cronbach α值为0.751 - 0.936。在内容效度分析中，修改后WOMAC的疼痛、僵硬、功能和生活质量四个维度提取的共同因子数分别为1、1、2和1。总方差解释率分别为65.684%、84.367%、67.252%和67.572%。在结构效度分析中，WOMAC和修改后WOMAC分别提取了4个共同因子。总方差解释率分别为70.100%和67.213%。WOMAC和修改后WOMAC与SF - 36均有显著相关性。修改后的WOMAC更适合中国人的生活习惯，但仍需更大样本进一步评估。
