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

Table 1

Hardy–Weinberg equilibrium test for the methylenetetrahydrofolate reductase polymorphisms.

MTHFR C677T	Actual frequency (%)	Theoretical frequency (%)	χ^2	value
CC	193 (19.59)	196.0 (19.89)	0.125	0.944
CT	492 (49.95)	486.6 (49.42)
TT	300 (30.46)	302.4 (30.69)
Total	985	985