Table 2.

Main data of all studies included in the meta-analysis for the -46G/A (Arg16Gly) polymorphism in β2-AR gene

				Case			Control
Study	Population location	Year	Age	AA	AG	GG	AA	AG	GG	OR	95%CI
Chan, I H[16]	Hong Kong	2008	10.4 ± 3.7	101	135	59	51	89	33	1.06	0.66-1.70
Cui, LY(Han)[17]	Neimenggu	2007	21-62	6	34	2	6	20	4	0.33	0.06-1.90
Cui, LY(Meng)[17]	Neimenggu	2007	26-69	3	21	6	6	19	5	1.25	0.34-4.64
Gao, J M[18]	Beijing	2004	38.7 ± 13.8	38	59	28	35	53	8	3.18	1.37-7.33
Li, H[19]	Shanghai	2009	3-12	86	76	30	46	100	46	0.59	0.35-0.98
Liao, W[20]	Chongqing	2001	5.8 ± 4.3	12	27	11	14	28	8	1.48	0.54-4.06
Qiu, Y Y(2008)[21]	Jiangsu	2008	63.2 ± 5.6	25	31	14	34	55	23	0.97	0.46-2.04
Shi, X H[22]	Jiangsu	2008	34(14-66)	22	19	7	10	25	13	0.46	0.17-1.28
Wang, Z[23]	Anhui	2001	30.6 ± 16.2	52	54	22	38	64	34	0.62	0.34-1.14
Xie, Y[24]	Shanghai	2008	4.98 ± 2.78	14	37	6	21	34	7	0.92	0.29-2.93
Xing, J[25]	Beijing	2001	20-66	9	62	29	29	55	16	2.14	1.08-4.26
Zhang, X Y[26]	Chongqing	2008	1.08-17	81	111	25	19	23	8	0.68	0.29-1.62
Wang, J Y[27]	Taiwan	2009	7.82 ± 3.81	138	207	97	173	250	87	1.37	0.99-1.89