APOE and coronary artery disorder: Also, the comparison of APOE genotypes between different categories of CAD patients indicated that the prevalence of ε3/ε4 genotype (in comparison to ε3/ε3 genotype as reference group) was significantly more common among CAD patients with three stenotic vessels (30/28) relative to CAD patients with one stenotic vessels (15/47) (OR=3.35, 95% CI =1.54-7.30; P=0.002).