Reliability and validity of the Turkish version of the satisfaction module of the Orthotics and Prosthetics Users' Survey

Background: Evaluation of prosthesis and orthosis (P&O) devices and service satisfaction in patients using P&O are important to understand the patient perspective and improve the quality of devices and the services. Objective: The aim of this study was to translate the original Orthotics and Prosthetics Users' Survey (OPUS) satisfaction module into Turkish and examine its psychometric properties in lower limb P&O users. Study Design: Cross-sectional study. Methods: The Turkish versions of the OPUS-Client Satisfaction with Device (CSD) and Service (CSS) modules were applied to 157 individuals using a lower limb prosthesis or orthosis. The retest of the survey was applied 5-7 days later. Intraclass correlation coefficient was used to determine test-retest reliability, and Cronbach alpha was used to determine internal consistency. Criterion validity was evaluated using the Nottingham Health Profile. Exploratory factor analysis was used to examine the factor structure of the Turkish version of the OPUS satisfaction module. Results: The test-retest correlation (intraclass correlation coefficient 5 0.92 for CSD and 0.91 for CSS) and internal consistency (Cronbach's alpha 5 0.84 for CSD and 0.95 for CSS) were high. A statistically significant correlation was found between the OPUS CSD and CSS modules and the Nottingham Health Profile (r520.325 for CSD module, r520.381 for CSS module, P, 0.001). The factor analysis revealed one-factor structure for both modules. Conclusions: This study demonstrated the reliability and validity of the Turkish version of the OPUS satisfaction module, and it provides a useful starting point for future studies on this survey.