MTHFR and coronary artery disorder: The genotype of MTHFR c.677C>T (CC, CT, and TT) in the CHD group was 50 (20.4%), 107 (43.6%), and 88 (35.9%), respectively, whereas in the control group, the corresponding frequencies were 80 (32.6%), 114 (46.5%), and 51 (20.8%), respectively.