Developing post-stroke psychometric properties for an Adherence to rehabilitation regimen scale: A sequential exploratory mixed-method study

Adherence to rehabilitation in patients post-stroke plays a significant role in the effectiveness of rehabilitation and patient recovery. This study aimed to design and determine the psychometric properties of a scale for measuring adherence to the rehabilitation regimen in patients post-stroke in the Iranian community. The present study used a sequential exploratory mixed method and was conducted in two phases (phase one qualitative and phase two quantitative). Participants in the first phase were patients post-stroke, caregivers, and rehabilitation team members (n=20). The second phase was conducted on patients post-stroke (n=198), and the psychometric steps, including face, content, and construct validity, as well as reliability, were assessed. The Adherence to Rehabilitation Regimen Scale (ARRS)was designed with 26 items and four factors of participation: 1) physical exercises, 2) following prescribed regimens, 3) performing the activities of daily living, and 4) psychological follow-up. The internal consistency was 0.96 by calculating Cronbach's alpha coefficient. The Interclass Correlation Coefficient was 0.99 with a confidence interval of 0.96-0.99. The scale measuring adherence to the rehabilitation regimen in patients post-stroke has optimal psychometric properties. Therefore, as the first specific scale to measure the degree of rehabilitation regimen adherence in patients post-stroke, this tool may be beneficial for other rehabilitation programs interested in managing and improving program adherence.