validation of the persian version of the exercise adherence rating scale in iranian population: a methodological study

Background: adherence to exercise is the degree to which an individual's behavior conforms to the agreed recommendations of healthcare providers. objectives: this study was done to translate and validate the exercise adherence rating scale (ears) in the iranian population. methods: a total of 160 patients with musculoskeletal pain participated in this methodological and cross-sectional study. at first, the english version of ears was translated into the persian language. the translation process was applied in a forward and backward fashion by four native persian speakers based on international guidelines. content validity [content validity ratio (cvr), content validity index (cvi)], construct validity [exploratory factor analysis (efa)], test-retest reliability, and internal consistency of the persian version of the ears were assessed. results: the results showed that the persian version of ears is contently valid (cvr: 0.6 - 1, cvi: 0.8 - 1). principal axis factoring for construct validity showed that the ears items loaded to one component (adherence behavior: variance = 67.76%, adherence/non-adherence reasons: variance = 61.88%). test-retest reliability analysis showed good to excellent reproducibility (0.88 - 1). the internal consistency of the translated questionnaire was in good ranges (0.7 - 0.74). conclusions: the translated version of ears is a reliable and valid measure to assess exercise adherence. our study results have implications for conducting comparative studies and clinical trials in the iranian people who need home-based exercises.