Polymorphism of MTHFR C677T Gene and the Associations with the Severity of Essential Hypertension in Northern Chinese Population

Figure 4

Distribution of the MTHFR C677T genotype in patients with different grades of hypertension. The TT genotype was widely distributed in patients with grade 3 hypertension, accounting for 70.2% of the individuals with a TT genotype. The CC genotype was more widely distributed in patients with grade 1 and 2 hypertension (30.9% and 50%, respectively).