. 2013 Mar 2;10(4):457–466. doi: 10.7150/ijms.5234

Table 2.

Characteristics of the studies rs9340799 polymorphism included in the meta-analysis.

First author and publication year	Region	Gender (M/F)		Mean age (year)		Sample size		Genotype frequency in cases			Alleles in cases		Genotype frequency in controls			Alleles in control		P HWE
First author and publication year	Region	Cases	Controls	Cases	Controls	Cases	Controls	AA	AG	GG	A	G	AA	AG	GG	A	G	P HWE
Huang, 2002 ³¹	Hubei	81/54	50/68	No mentioned	No mentioned	135	118	96	32	7	224	46	83	30	5	196	40	0.3
Zheng, 2002 ³²	Hebei	0/51	0/52	64.2±9.7	62.05±7.8	51	52	3	44	4	50	52	8	42	2	58	46	0.12
Cheng, 2006 ³³	Tianjin	105/95	98/92	56.5±0.4	52.4±0.6	200	190	147	49	4	343	57	139	49	2	327	53	0.31
Li, 2006 ³⁴	Tianjin	0/165	0/80	61.7±8.2	59.9±7.7	165	80	96	57	12	249	81	40	31	9	111	49	0.43
Xu, 2008 ¹⁹	Jiang- su	94/116	89/85	56.0±7.3	55.0±8.6	210	174	40	57	113	109	283	33	43	98	109	219	0.11
Tang, 2008 ³⁵	Hubei	161/0	158/0	61.4±8.1	60.9±6.4	161	158	66	74	20	206	114	65	73	21	203	115	0.15
Jin, 2010 ³⁶	Guangdong	169/67	75/42	64.0±11.0	62.0±11.0	236	117	168	58	10	394	78	83	30	4	196	38	0.53
Shen, 2012 ³⁷	Chongqing	289/250	286/253	57.3±7.2	56.4±9.1	539	539	123	258	158	504	572	131	265	143	527	551	0.71
Total						1697	1428	739	629	328	2079	1283	582	563	284	1727	1111

M: male; F: female; HWE: Hardy-Weinberg equilibrium.