Table 1.

General Characteristics of Studies Included in the Meta-analysis

Author	Country	publication language	Year	Genotype distribution						OR (95% CI)	OR (95% CI)	Control X2 HWE	P value
				case			control
				ArgArg	ArgGln	GlnGln	ArgArg	ArgGln	GlnGln	ArgArg/(GlnGln+ArgGln)	(ArgGln+ArgArg)/GlnGln
Shu	China	English	2003	561	442	85	610	498	74	1.00 (0.85-1.18)	0.79 (0.57-1.09)	4.369a	0.037
Jin MJ	China	Chinese	2006	48	27	8	127	97	27	0.88 (0.39-2.03)	1.13 (0.49-2.59)	1.658	0.198
Qian Y	China	Chinese	2010	349	255	62	412	304	73	1.01 (0.71-1.44)	0.99 (0.70-1.42)	2.382	0.123
Li Liu	China	English	2011	518	402	84	547	367	81	1.03 (0.75-1.42)	0.97 (0.71-1.33)	3.014	0.083
Peijian Ding	China	English	2014	318	209	79	347	254	32	2.82 (1.84-4.32)	0.36 (0.23-0.54)	2.814	0.093
Hao Luo	China	English	2014	83	90	21	137	91	17	1.63 (0.83-3.18)	0.61 (0.31-1.20)	0.126	0.723
Zhai XJ	China	English	2006	173	101	28	347	240	52	1.15 (0.71-1.87)	0.87 (0.54-1.40)	1.315	0.251
Hsu	China Taiwan	English	2010	198	149	48	276	202	53	1.25 (0.82-1.89)	0.80 (0.53-1.21)	3.087	0.079
Sangrajrang	Thailand	English	2008	268	201	38	246	158	20	1.64 (0.94-2.86)	0.61 (0.35-1.07)	0.715	0.398
IARC-Thai	Thailand	English	2006	241	188	31	228	141	19	1.40 (0.78-2.53)	0.71 (0.40-1.28)	0.221	0.638
Kim	Korea	English	2002	92	79	34	90	101	14	1.04 (0.70-1.54)	0.37 (0.19-0.71)	4.156a	0.041
Seoul	Korea	English	2006	148	119	41	149	144	21	0.98 (0.71-1.34)	0.47 (0.27-0.81)	3.139	0.076
Chacko	India	English	2005	56	50	17	79	35	9	2.15 (1.29-3.58)	0.49 (0.21-1.15)	3.081	0.079
Saadat	Iran	English	2008	83	70	33	81	90	16	0.95 (0.63-1.43)	0.43 (0.23-0.82)	1.683	0.195
Mitra	India	English	2008	44	52	54	83	107	35	1.41 (0.90-2.19)	0.33 (0.20-0.54)	0.003	0.958
Syamala	India	English	2009	147	154	58	193	126	48	0.63 (0.47-0.84)	0.78 (0.52-1.18)	12.743a	0.0004

^aThe studies are not in HWE.