Suh Kuen Tak, Kim Jeung Il, Lim Jong Min, Goh Tae Sik, Lee Jung Sub
Department of Orthopaedic Surgery, Medical Research Institute, Pusan National University Yangsan Hospital, Yangsan, Republic of Korea.
J Spinal Disord Tech. 2012 Dec;25(8):447-50. doi: 10.1097/BSD.0b013e3182337792.
Prospective study.
To evaluate the reliability and validity of the adapted Korean version of the Quebec Back Pain Disability Scale (QDS).
The Korean version of the QDS has not been validated.
Translation/retranslation of the English version of QDS was conducted, and all steps of the cross-cultural adaptation process were performed. The Korean version of the Visual Analog Scale (VAS) measure of pain, QDS and the previously validated Oswestry Disability Index (ODI) and Short Form-36 (SF-36) were mailed to 100 consecutive patients with chronic low back pain of at least 3 months duration. Eighty patients responded to the first mailing of questionnaires and 59 of the first time responder returned their second survey. The average age of the 59 patients (39 female, 20 male) was 48.0 years. Reliability assessment was determined by estimating κ statistics of agreement for each item, the intraclass correlation coefficient (ICC) and the Cronbach α. Concurrent and construct validity was evaluated by comparing the responses of QDS with the results of VAS and responses of ODI and SF-36 by using the Pearson correlation coefficient.
The constructed Bland Altman plot showed a good reliability. All items had a κ statistics of agreement > 0.6. The QDS showed excellent test/retest reliability as evidenced by the high ICC for both assessments (ICC = 0.9094; P < 0.001). Internal consistency was found to be very good at both assessments with the Cronbach α (0.9172 and 0.9319 at first and second assessments, respectively). The QDS was correlated with the VAS (r = 0.647; P < 0.001 and r = 0.609; P < 0.001 at first and second assessments, respectively) and with the ODI (r = 0.718; P < 0.001 and r = 0.690; P < 0.001, respectively). The Korean version of the QDS showed a good significant correlation with functional scales of SF-36.
The adapted Korean version of the QDS was successfully translated and showed acceptable measurement properties, and as such, is considered suitable for outcome assessments in the Korean-speaking patients with low back pain.
前瞻性研究。
评估改编后的韩文版魁北克腰痛残疾量表（QDS）的信度和效度。
韩文版QDS尚未经过验证。
对英文版QDS进行翻译/回译，并完成跨文化适应过程的所有步骤。将韩文版视觉模拟疼痛量表（VAS）、QDS以及先前验证过的奥斯威斯利残疾指数（ODI）和简短健康调查问卷36项版本（SF-36）邮寄给100例连续的慢性下腰痛患者，这些患者病程至少3个月。80例患者回复了首次邮寄的问卷，其中59例首次回复者返回了第二次调查问卷。这59例患者（39例女性，20例男性）的平均年龄为48.0岁。通过估计各项目的κ一致性统计量、组内相关系数（ICC）和克朗巴哈α系数来确定信度评估。通过使用皮尔逊相关系数，将QDS的回答与VAS的结果以及ODI和SF-36的回答进行比较，来评估同时效度和结构效度。
构建的布兰德-奥特曼图显示出良好的信度。所有项目的κ一致性统计量均>0.6。QDS显示出极好的重测信度，两次评估的ICC均很高（ICC = 0.9094；P < 0.001）。两次评估的内部一致性均非常好，克朗巴哈α系数分别为0.9172和0.9319。QDS与VAS相关（第一次和第二次评估时r分别为0.647；P < 0.001和r = 0.609；P < 0.001），与ODI相关（r分别为0.718；P < 0.001和r = 0.690；P < 0.001）。韩文版QDS与SF-36的功能量表显示出良好的显著相关性。
改编后的韩文版QDS已成功翻译，并显示出可接受的测量特性，因此被认为适用于韩语背景下的下腰痛患者的结局评估。
