Risk factors for premature myocardial infarction: a matched case-control study.
BACKGROUND
Myocardial infarction in young age is increasing. Identifying risk factors could be important for health promotion. We studied classic atherosclerotic risk factors in premature myocardial infarction.


METHODS
In this matched case-control study, which was conducted from 2005 to 2007 in Birjand County, the east of Iran, atherosclerotic risk factors (hyperten-sion, family history of coronary artery diseases, obesity, diabetes mellitus, dyslipidemia) of 98 patients affected by acute myocardial infarction aged under 50 years were compared with that of 98 healthy neighborhood controls.


RESULTS
Mean levels of cholesterol, triglyceride, low-density lipoprotein, as well as systolic blood pressure and body mass index were significantly higher in cases than in controls. There was a positive association between coronary artery disease at younger age and dyslipidemia OR=2.8 [95% CI: 1.5, 5.2], smoking OR=6.4 [95% CI: 3.0, 13.5], systolic hypertension OR=3.1 [95% CI: 1.5, 6.3], family history of coronary artery diseases OR=10.9 [95% CI: 3.2, 37.9] and diabetes OR=2.5 [95% CI: 1.04, 6.2].


CONCLUSIONS
Smoking, systolic hypertension and dyslipidemia were the most common risk factors among patients with premature myocardial infarction.
Birjand Cardiovascular Research Center, Department of Cardiology, School of Medicine, Birjand University of Medical Sciences, Birjand, Iran.
Tooba
T
Kazemi
Gholam Reza
GR
Sharifzadeh
Asghar
A
Zarban
Azita
A
Fesharakinia
Mohamad Reza
MR
Rezvani
Seyed Ali
SA
Moezy