Translation and validation study of the Iranian version of the myocardial infarction dimensional assessment scale (MIDAS)

Objective (s): To translate and evaluate the the myocardial infarction dimensional assessment scale (MIDAS), as a disease-specific quality of life scale in patients with myocardial infarction in Iran. After permission, the questionnaire was translated. Then face validity, content validity, concurrent validity and criterion validity were assessed. In order to evaluate the construct validity, known-groups comparison (patients with and without smoking) was performed. For criterion validity the Short Form 36 (SF-36) was used. Cronbach's alpha coefficients and the test retest were used to assess the scale reliability. One hundred patients with myocardial infarction participated in the study. The criterion validity showed high and significant correlation between most the MIDAS and the SF-36 scores. The Cronbach’s alpha for the scale ranged from 0.74 to 0.887 and test-retest reliability (ICC) within 2 weeks, in all dimensions was greater than 0. 90. The findings suggest that the MIDAS is a valid and reliable disease-specific scale and can be considered for measuring health outcomes in research and clinical settings.