Department of Rehabilitation, College of Health and Rehabilitation Sciences, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia.
Department of Physiotherapy and Rehabilitation, Faculty of Health Sciences, Istanbul Medeniyet University, Istanbul, Turkey.
Health Qual Life Outcomes. 2021 Apr 27;19(1):134. doi: 10.1186/s12955-021-01773-1.
The Client Satisfaction with Devices (CSD) module of the Orthotics and Prosthetics Users' Survey is an extensively used questionnaire that measures patients' satisfaction with orthosis and prosthesis. However, the validated version for Arabic speakers (CSD-Ar) is only applicable for orthosis users.
The aim of this study was to evaluate the psychometric proprieties of the CSD-Ar for prosthetics users.
The study used a convenience sample of prosthesis users from Saudi Arabia and Turkey (N = 183), who completed the CSD-Ar. The collected data were analysed using Rasch analysis to evaluate item fit, reliability indices, item difficulty, local item dependency, and differential item functioning (DIF) using WINSTEPS version 4.6.1.
Based on the analysis, the four-response Likert-scale was acceptable, as shown by the category functioning test, All eight items did achieve a fit to the Rasch Model [(infit) and (outfit) mean-square 0.75 to 1.3]. Person separation reliability was 0.76, and item separation reliability was 0.94. A principal component analysis (PCA) showed satisfactory unidimensionality and no local item dependency. The DIF analysis showed no notable dependency among items on participant characteristics in terms of age, gender, duration of use, country, and level of amputation.
This study contributes to the confidence of using CSD-Ar to evaluate users' satisfaction with different prostheses, affirming the need for further refinement of the quality of the outcome measure.
矫形器和假肢使用者调查的客户满意度 (CSD) 模块是一种广泛使用的问卷，用于衡量患者对矫形器和假肢的满意度。然而，适用于阿拉伯语使用者的经过验证的版本（CSD-Ar）仅适用于矫形器使用者。
本研究旨在评估 CSD-Ar 对假肢使用者的心理测量特性。
该研究使用了来自沙特阿拉伯和土耳其的假肢使用者的便利样本（N=183），他们完成了 CSD-Ar。使用 Rasch 分析收集的数据，评估项目拟合、可靠性指数、项目难度、局部项目依赖性和差异项目功能（DIF），使用 WINSTEPS 版本 4.6.1。
基于分析，四响应 Likert 量表是可接受的，如类别功能测试所示，所有八项项目都符合 Rasch 模型 [(infit) 和 (outfit) 均方 0.75 至 1.3]。人员分离可靠性为 0.76，项目分离可靠性为 0.94。主成分分析 (PCA) 显示出令人满意的单维性和没有局部项目依赖性。DIF 分析表明，在年龄、性别、使用时间、国家和截肢水平等参与者特征方面，项目之间没有明显的依赖性。
本研究有助于对 CSD-Ar 用于评估不同假肢使用者满意度的信心，证实需要进一步改进结果测量的质量。
