2.

各研究病例组和对照组对象的等位基因频率及基因型分布

Distribution of G312A polymorphism genotype among cases and controls in the meta-analysis (Italic type indicates the distribution of the genotypes in controls of the study is not in HWE)

First author (year)	Ethnicity	Lung caner (n)				Control (n)
		GG	AG	AA		GG	AG	AA
Butkiewicz (2001)[10]	Caucasian	43	35	18		29	48	17
Chang (2008)[245]	African American	186	58	3		212	60	5
Chang (2008)[25]	Latinos	60	40	8		192	93	12
De Ruyck (2007)[18]	Caucasian	44	53	13		49	46	14
Hou (2002)[9]	Caucasian	68	94	22		66	72	24
Hu (2006)[15]	Asian	850	116	4		874	111	1
Kong FJ (2006)[26]	Asian	101	17	2		106	14	0
Liang (2003)[11]	Asian	870	125	11		889	130	1
Lopez-Cima (2007)[19]	Caucasian	240	221	55		260	230	43
Matullo (2006)[20]	Caucasian	49	48	19		418	506	170
Misra (2003)[12]	Caucasian	143	127	43		125	147	40
Popanda (2004)[21]	Caucasian	182	211	70		192	196	72
Raaschou (2008)[22]	Caucasian	177	188	59		329	351	107
Shen (2005)[16]	Asian	109	9	0		99	14	0
Spitz (2001)[7]	mixed	102	72	21		135	104	18
Yin (2008)[17]	Asian	200	1	0		170	0	1
Zhou (2002)[24]	Caucasian	463	479	150		543	572	125
Zienolddiny (2006)[23]	Caucasian	119	102	54		120	121	49