Table 1. Information of studies included in meta-analyses of ADH1B Arg47His polymorphism on ESCC risk.

First author [Ref]	Year	Country (Province)	cases	controls	Crude OR
					Arg/Arg vs.His/His	Arg/His vs.His/His
Ding [15]	2009	China(Jiangsu)	191	221	2.42(1.02−5.77)	1.30(0.85−1.99)
Oze [16]	2009	Japan(Aichi)	585	1170	3.25(2.22−4.76)	1.32(1.07−1.63)
Cui [24]	2009	Japan(unknown)	1067	2763	4.10(3.24−5.18)	1.17(1.00−1.37)
Akbari [17]	2009	Iran(Golestan)	743	1371	2.06(1.25−3.39)	1.71(1.03−2.85)
Guo [18]	2008	China(Gansu)	80	480	1.46(0.71−2.59)	3.67(1.26−8.73)
Lee [19]	2008	China(Taiwan)	406	656	6.09(4.10−9.03)	1.30(0.98−1.72)
Yang [20]	2007	China(Sichuan)	191	198	1.91(0.92−3.95)	1.89(1.10−3.22)
Chen [21]	2006	China(Taiwan)	330	592	5.65(3.67−8.69)	1.22(0.90−1.65)
Wu [22]	2005	China(Taiwan)	134	237	6.89(3.52−13.49)	1.52(0.94−2.47)
Yang [25]	2005	Japan(Aichi)	165	494	1.12(0.44−2.86)	2.07(1.44−2.99)
Yokoyama [26]	2002	Japan(unknown)	234	634	5.728(3.49−9.39)	1.16(0.82−1.62)
Hori [23]	1997	Japan(Tokyo)	94	130	6.15(2.41−15.67)	1.65(0.91−2.99)

Unknown: no special province.