Table 2. Characteristics of enrolled studies for rs2740348.

Author name	Year	Country	Diseases	Ethnicity	Genotyping methods	Sample size		Case genotype		Control genotype		Quality
						Case	Control	GG	GC + CC	GG	GG + CC
Jiaming Liu	2013	China	Prostate cancer	Asian	HRM method	300	244	246	54	182	62	7
Yohei Horikawa	2008	American	Renal cell carcinoma	Caucasian	SNPlex	276	278	192	84	168	110	8
Ying Xie	2015	China	Gastric cancer	Asian	PCR-LDR	137	144	110	27	115	29	7
Yuanqing Ye	2008	American	Esophageal cancer	Caucasian	SNPlex	346	346	238	108	238	108	7
Yufei Zhao	2015	China	Colorectal cancer	Asian	PCR-LDR	163	142	128	35	114	28	7
Jong-Sik Kim	2010	Korea	Lung cancer	Asian	Spectrometry-based	92	90	74	18	71	19	7

Notes.

Abbreviations:

HRM method

high resolution melting method