An analysis of the study groups according to gender showed a marginally significant difference between the CAD and the control group for the BsmI and Taq1 VDR polymorphism genotype frequency in males (χ2 test, p = 0.058 and χ2 test, p = 0.063, respectively (Additional file 1: Table S10). This evidence concerns the gene VDR and coronary artery disorder.