Table 4. Heterogeneity evaluation.

SNP	Comparison	I2	P-value	Model
rs1800629	A vs. G	55.7%	<0.001	Random
	AA vs. GG	0.0%	0.828	Fixed
	GA vs. GG	56.9%	<0.001	Random
	GA+AA vs. GG	58.2%	<0.001	Random
	AA vs. GG+GA	0.0%	0.892	Fixed
	carrier A vs. carrier G	37.1%	0.029	Random
rs361525	A vs. G	43.6%	0.077	Fixed
	AA vs. GG	0.0%	0.961	Fixed
	GA vs. GG	40.8%	0.095	Fixed
	GA+AA vs. GG	42.3%	0.085	Fixed
	AA vs. GG+GA	0.0%	0.974	Fixed
	carrier A vs. carrier G	27.8%	0.197	Fixed

SNP: single nucleotide polymorphisms.