Impact of Sport on the Cardiovascular Diseases Scale Based on Health Belief Model: Questionnaire Psychometric Properties

Inactivity is one of the factors to increase the risk of having cardiovascular diseases. This methodological design study was conducted on the staff of Ilam Medical Science University (Ilam, Iran) in 2016 in order to assess the psychometric properties of the Iranian version of Impact of Sport on the Cardiovascular Diseases Scale based on the Health Belief Model (HBM - ISCS). In this study, first, targeted questions were selected based on the scientific literature review (N = 54) and then, the basic version of the questionnaire, including 14 questions in terms of HBM (Health Belief Model) constructs, went on the validation phase using the opinions of experts. At this stage, content and construct validity and reliability were reviewed and approved. Over all, 433 individuals with a mean age of about 38 years participated in the study. Based on the results, content validity rate (CVR) higher than 0.05 (number of specialists = 20) and content validity index (CVI) higher than the acceptable level of 0.79 were calculated. The primary Exploratory Factor Analysis (in a random spitted sample, N = 187) extracted five factors that jointly accounted for 59.804% of the variance observed. The results of Confirmatory Factor Analysis (in a random spitted sample, N = 246) showed that the questionnaire has desirable construct validity: (X2 = 146.81, df = 67, P < 0.001, CFI = 0.93, IFI = 0.93, RMSEA = 0.074 and SRMR = 0.067). Similarly, the Cronbach’s alpha coefficient was calculated between 0.715 and 0.816, and the Intraclass Correlation Coefficient (ICC) was obtained between 0.455 and 0.623 for the subscales. The results indicated that HBM - ISCS is a valid and reliable tool for measuring the health beliefs about the impact of sport on CVDs prevention.