The frequency of the AGT T521 and C702 alleles was significantly higher in the CAD patients than in control group (OR: 0.551, 95%CI: 0.359–0.846, P=0.008 and OR: 0.629, 95% CI: 0.422–0.936, P=0.028, respectively). The gene discussed is AGT; the disease is coronary artery disorder.