en ● Disease Control مقاله اصيل پژوهشي Orginal Article <div style="text-align: justify;"><strong>Background</strong>: Iranian students are at high risk for cardiovascular disease. A valid tool to measure cardiovascular health-related behaviors is the first step toward preventing such diseases in this population. Therefore, this study aimed to develop and psychometrically validate a cardiovascular health behavior (CHB) scale for Iranian students.<br> <strong>Methods</strong>: This exploratory sequential mixed-methods study was conducted in 2024 among 684 students. Face and content validity were assessed. Construct validity was evaluated using exploratory and confirmatory factor analysis (EFA, CFA). Reliability was measured using McDonald&rsaquo;s omega and Cronbachs &alpha; coefficients. Data were analyzed using SPSS software, version 26, and CFA using AMOS software, version 24.<br> <strong>Results</strong>: Following a systematic review and interviews, an initial pool of 52 items was generated. After removing duplicates and merging similar items, all 52 items had an impact score above 1.5. Following content validity assessment, the number of items was reduced to 36, with a content validity ratio (CVR)&ge;0.62 and a content validity index ranging from 0.80 to 1. Exploratory factor analysis (EFA) yielded a final 15-item scale with a five-factor structure, which collectively accounted for 54.67% of the total variance. CFA indicated factor loadings ranging from 0.22 to 0.80. The model demonstrated a good fit (incremental fit index [IFI], comparative fit index [CFI], adjusted goodness-of-fit index >0.9; parsimonious CFI>0.5; root mean square error of approximation (RMSEA)=0.048; CMIN/DF=1.663). Cronbach&rsquo;s &alpha; and McDonald&rsquo;s omega coefficients for all five factors exceeded 0.8.<br> <strong>Conclusion</strong>: The CHB scale for Iranian students is a valid and reliable tool suitable for use in future research.&nbsp;<br> &nbsp;</div> Students, Questionnaire design, Psychometrics, Heart disease risk factors 433 442 http://jrh.gmu.ac.ir/browse.php?a_code=A-10-2719-1&slc_lang=en&sid=1 Nasrin Sarabi nasinsaraby06@gmail.com 1 100319475328460048832 No Department of Nursing, School of Nursing and Midwifery, Dezful University of Medical Sciences, Dezful, Iran. Rashed Khezri rashedkhezri76@gmail.com 2 100319475328460048833 No Student Research Committee, Dezful University of Medical Sciences, Dezful, Iran. Hediyeh Mohaghegh hediyeh.mohaghegh@gmail.com 3 100319475328460048834 No Department of Cardiology, School of Medicine, Ganjavian Hospital, Dezful University of Medical Sciences, Dezful, Iran. Fatemeh Pourmotahari pourmotahari@yahoo.com 4 100319475328460048835 Yes Department of Community Medicine, School of Medicine, Dezful University of Medical Sciences, Dezful, Iran.