Table 5.

Heterogeneity test of rs4977574 association studies by subgroup analyses.

Ethnic Group	Studies/Stages (n)	OR (95% CI)	Weight (%)	Z	p(z)	I2	P	τ2	Heterogeneity Statistic
Caucasians	16	1.28 (1.23–1.32)	80.72	13.11	<0.0001	48.6%	0.015	0.0024	29.17
Asians	7	1.23 (1.13–1.34)	19.28	4.74	<0.0001	41.0%	0.118	0.0040	10.16
Overall	23	1.27 (1.22–1.31)	100.00	12.85	<0.0001	54.2%	0.001	0.0034	48.01