Table 3. Subgroup analysis of the relationship between MTHFR C677T polymorphism and the susceptibility to VTE.

Comparison	Group	OR (95%CI)	I2, P
CC+CT vs TT	Total	0.68 (0.56, 0.83)	69%, <0.0001
	Asian	0.54 (0.46, 0.65)	10%, 0.34
	Caucasian	0.85 (0.63, 1.14)	69%, <0.0001
CC vs CT+TT	Total	0.82 (0.74, 0.93)	62%, <0.0001
	Asian	0.79 (0.66, 0.95)	38%, 0.06
	Caucasian	0.88 (0.72, 1.07)	71%, <0.0001
CC vs TT	Total	0.65 (0.52, 0.81)	69%, <0.0001
	Asian	0.52 (0.42, 0.65)	19%, 0.24
	Caucasian	0.81 (0.58, 1.12)	72%, <0.0001
CT vs TT	Total	0.73 (0.60, 0.89)	61%, <0.0001
	Asian	0.56 (0.46, 0.68)	13%,0.31
	Caucasian	0.93 (0.73, 1.19)	50%, 0.01
C vs T	Total	0.80 (0.71, 0.90)	76%, <0.0001
	Asian	0.74 (0.65, 0.83)	41%, 0.04
	Caucasian	0.88 (0.74, 1.04)	81%, <0.0001

OR, odds ratio.