Department of Psychology, Health and Technology, Arthritis Centre Twente, University of Twente, PO Box 217, 7500 AE, Enschede, The Netherlands.
Qual Life Res. 2013 Mar;22(2):423-9. doi: 10.1007/s11136-012-0162-2. Epub 2012 Mar 28.
The Effective Consumer Scale (EC-17) measures the skills of musculoskeletal patients in managing their own healthcare. The objectives of this study were to translate the EC-17 into Dutch and to further evaluate its psychometric properties.
The EC-17 was translated and cognitively pretested following cross-cultural adaptation guidelines. Two hundred and thirty-eight outpatients (52 % response rate) with osteoarthritis or fibromyalgia completed the EC-17 along with other validated measures. Three weeks later, 101 patients completed the EC-17 again.
Confirmatory factor analysis supported the unidimensional structure of the scale. The items adequately fit the Rasch model and only one item demonstrated differential item functioning. Person reliability was high (0.92), but item difficulty levels tended to cluster around the middle of the scale, and measurement precision was highest for moderate and lower levels of skills. The scale demonstrated adequate test-retest reliability (ICC = 0.71), and correlations with other measures were largely as expected.
The results supported the validity and reliability of the Dutch version of the EC-17, but suggest that the scale is best targeted at patients with relatively low levels of skills. Future studies should further examine its sensitivity to change in a clinical trial specifically aimed at improving effective consumer skills.
有效消费者量表（EC-17）衡量肌肉骨骼患者管理自身医疗保健的技能。本研究的目的是将 EC-17 翻译成荷兰语，并进一步评估其心理测量学特性。
根据跨文化适应指南对 EC-17 进行翻译和认知预测试。238 名患有骨关节炎或纤维肌痛的门诊患者（52%的回复率）完成了 EC-17 以及其他经过验证的措施。3 周后，101 名患者再次完成了 EC-17。
验证性因子分析支持该量表的单维结构。项目充分符合 Rasch 模型，只有一个项目表现出不同的项目功能。人员可靠性很高（0.92），但项目难度水平倾向于集中在量表的中间，测量精度在技能中等和较低水平最高。该量表具有良好的重测信度（ICC=0.71），与其他测量工具的相关性基本符合预期。
结果支持 EC-17 的荷兰语版本的有效性和可靠性，但表明该量表最适合针对技能相对较低的患者。未来的研究应进一步在专门旨在提高有效消费者技能的临床试验中检验其对变化的敏感性。
