Japanese Orthopaedic Association Cervical Myelopathy Evaluation Questionnaire (JOACMEQ) in mainland China: an investigat
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RESEARCH
Japanese Orthopaedic Association Cervical Myelopathy Evaluation Questionnaire (JOACMEQ) in mainland China: an investigation of reliability, validity, and responsiveness Feifei Zhou1*†, Shuyang Li1†, Yilong Zhang1, Yanbin Zhao1, Kevin L. Ju2, Fengshan Zhang1, Shengfa Pan1 and Yu Sun1
Abstract Background: The aim of this study is to investigate the reliability, validity, and responsiveness of JOACMEQ for CSM patients in mainland China. Methods: A retrospective review was performed on 91 patients with CSM in our hospital from March 2015 to June 2015. Patients completed the JOACMEQ, the mJOA and the SF-36 questionnaires during the process. Cronbach’s α was used to evaluate the internal consistency reliability, and test–retest reliability was checked. An exploratory factor analysis was used to determine the correlations among the JOACMEQ questions and the construct validity. The concurrent validity was assessed by Spearman correlation coefficient. The internal responsiveness was determined by effect sizes and standardized response means. External responsiveness was determined by the area under the receiver operating characteristic curve on the basis of the Youden Index. Results: The mean age of patients was 57.61 years old. The mean follow-up was 24 months. JOACMEQ showed a good internal consistency (Cronbach’s α, 0.897). Test–retest reliability showing good result (Pearson’s correlation, 0.695–0.905). Our data were amenable to factor analysis (KMO = 0.816, Bartlett’s test, χ2(45) = 1199.99, p
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