MTHFR and arteriosclerosis: And the MTHFR T/T genotype in the co-dominant model (MTHFR T/T vs. MTHFR C/C) (adjusted OR 1.943, 95% CI 1.179–3.203, P = 0.009), MTHFR C/T and T/T genotypes in the dominant model (MTHFR C/T plus MTHFR T/T vs. MTHFR C/C) (adjusted OR 1.387, 95% CI 1.061–1.813, P = 0.017), and MTHFR T/T genotype in the recessive model (MTHFR T/T vs. MTHFR C/C plus MTHFR C/T) (adjusted OR 1.685, 95% CI 1.042–2.723, P = 0.033) were significant risk factors for the presence of arteriosclerosis in multiple arteries (Table 4).