Table 2. Genotype distributions in case and control groups.

Study	Case/control	case			control			Outcome	ORG(95% CI)
		GG	GA	AA	GG	GA	AA
Riha(2005)	103/190	52	44	7	130	52	8	Increased risk	2.01(1.27–3.19)
Liu(2006)	76/42	45	23	8	35	6	1	Increased risk	3.35(1.37–8.23)
Popko(2008)	102/77	73	29	0	59	18	0	Increased risk	1.28(0.66–2.51)
Bushan(2009)	104/103	74	22	8	90	10	3	Increased risk	2.70(1.35–5.42)
									2.38(1.22–4.64)*
Almpanidou(2012)	220/319	118	83	19	221	84	14	Increased risk	1.90(1.35–2.65)
Guan(2013)	531/162	430	95	6	143	18	1	Increased risk	1.76(1.04–2.97)
Li(2013)	155/100	137	18	0	88	12	0	No association	0.95(0.44–2.04)

Note: *mean an adjustment for HWE.