X-ray repair cross-complementing group 1 polymorphisms and hepatocellular carcinoma: A meta-analysis

Table 2 Genotype distribution of X-ray repair cross-complementing group 1 polymorphisms used in this study

Polymorphism	Ref.	Ethnicity	Case			Control			HWE
Arg194Trp			Arg/Arg	Arg/Trp	Trp/Trp	Arg/Arg	Arg/Trp	Trp/Trp
	Tang et al[26]	Asian	94	41	15	81	58	11	0.88
	Bo et al[30]	Asian	94	31	5	116	12	2	0.02
	Zeng et al[29]	Asian	305	200	40	275	202	38	0.91
	Kiran et al[22]	Asian	8	43	12	27	64	52	0.35
Arg280His			Arg/Arg	Arg/His	His/His	Arg/Arg	Arg/His	His/His
	Tang et al[26]	Asian	138	11	1	123	26	1	0.76
	Zeng et al[29]	Asian	451	86	8	423	89	3	0.46
	Wu et al[27]	Asian	76	23	1	47	13	0	0.34
	Kiran et al[22]	Asian	19	30	14	91	29	35	0.00
Arg399Gln			Arg/Arg	Arg/Gln	Gln/Gln	Arg/Arg	Arg/Gln	Gln/Gln
	Tang et al[26]	Asian	41	94	15	84	54	12	0.43
	Zeng et al[29]	Asian	312	196	37	309	169	37	0.04
	Kiran et al[22]	Asian	25	33	5	45	70	27	0.98
	Ren et al[25]	Asian	32	14	4	46	41	5	0.28
	Borentain et al[20]	Caucasian	27	21	8	27	43	19	0.80
	Kirk et al[23]	African	160	31	4	300	48	4	0.19
	Long et al[24]	Asian	72	63	5	362	159	15	0.62
	Han et al[21]	Asian	34	28	7	58	63	15	0.73
	Yu et al[28]	Asian	301	223	53	218	143	28	0.49

HWE: Hardy-Weinberg equilibrium.