Table 2.

MTHFR Polymorphisms in Patients of Different Onset Ages

Sites	C677T						A1298C						G1793A
	CC	CT	TT		C	T	AA	AC	CC		A	C	GG	GA	AA		G	A
Early
Total	25	52	37		102	126	79	32	3		190	38	98	16	0		212	16
HWE	0.411						0.910						0.422
Adult
Total	15	29	19		59	67	52	10	1		114	12	58	5	0		121	5
HWE	0.481						0.379						0.678
χ2Total†	0.133			0.143			3.701			3.414			1.443			1.352
df	2			1			2			1			2			1
p	0.9358			0.7055			0.1572			0.0647			0.2296			0.2449

Note: ^†Comparison in genotype and allele frequencies of three polymorphisms in patients of different onset ages.

Abbreviation: HWE, Hardy Weinberg Equilibrium.