Association of CYP1A1 MspI polymorphism in the esophageal cancer risk: a meta-analysis in the Chinese population

Table 1 Characteristics of studies included in the meta-analysis

Reference	Source of controls	Geographical locations	Histopathology type	Case number	Control number	Case			Control			HWE
						TT	CT	CC	TT	CT	CC	χ ²	P
Wu 2002 [16]	HB	Taiwan	ESCC	146	344	60	65	21	136	146	62	4.16	0.041
Li 2002 [17]	HB	Shaxi	NS	73	75	20	30	23	37	25	13	4.96	0.026
Yin 2005 [18]	HB	Jiangsu	ESCC	106	106	42	54	10	41	49	16	0.05	0.829
Zhu 2005 [19]	HB	Shaxi	ESCC + EAC	163	166	43	75	45	75	67	24	1.96	0.162
Han 2005 [20]	HB	Shaxi	ESCC	89	98	25	39	25	47	38	13	1.37	0.241
Lu 2006 [21]	PB	Xinjiang	ESCC	64	116	23	28	13	44	56	16	0.07	0.786
Yin 2010 [22]	HB	Xinjiang	NS	96	174	16	45	35	17	88	69	2.13	0.144
Ji 2010 [23]	PB	Gansu	ESCC	189	216	49	95	45	70	98	48	1.49	0.222
Gao 2012 [24]	PB	Ningxia	ESCC	40	80	15	17	8	28	41	11	0.43	0.511
Huang 2012 [25]	PB	Guangxi	ESCC	98	100	38	41	19	40	43	17	0.85	0.358
Zhang 2013 [26]	PB	Shandong	ESCC	138	170	34	78	26	59	83	28	0.02	0.896
Yun 2014 [27]	PB	Henan	ESCC	157	157	73	72	12	95	50	12	2.11	0.146
Zhang 2011 [28]	PB	Henan	ESCC + EAC	160	160	97		63	128		32	-

PB population-based, HB hospital-based, ESCC esophageal squamous cell carcinoma, EAC esophageal adenocarcinoma, NS not stated.

ISSN: 2047-783X