Materials and Methods: This study included 368 people who were equally divided into four groups of under 45-years-old coronary and non-coronary disease, as well as 45-years and older coronary and non-coronary disease. The participants were selected by means of the convenience sampling method from Madani heart center and Shohada hospital of Tabriz from March to June 2018. Non-coronary and coronary patients were matched in terms of gender and age (±3 years) and data were collected using a 65-item lifestyle questionnaire through interviews.

Results: The mean lifestyle scores were obtained as 103.02 ± 12.11, 123.83 ± 10.35, 99.25 ± 0.27, and 129.02 ± 10.65 for under 45-years-old coronary patients and their counterpart control group, as well as 45-years-old and older patients and their counterpart control group, respectively. Based on the results, there was a significant difference between coronary patients and non-coronary groups in both age categories (P < 0.001). Finally, the comparison of the mean lifestyle scores between the under 45-year-old and the 45-year-old and older groups showed that the two groups only had a significant difference in the subscale physical activity and exercise (P < 0.001) and dietary habits (P = 0.009).

Conclusions: In general, the risk factors for CAD in both age categories were similar except for lower physical activity and nutrition poorer in 45-year- old individuals. Accordingly, primary and secondary prevention, risk factor control, and promotion of a healthy lifestyle at family and society levels should start from childhood and adolescence.