Association between interleukin-4 gene intron 3 VNTR polymorphism and cancer risk

Table 1 Characteristics of eligible studies in the meta-analysis

ID	First author	Year	Country	Ethnicity	Source of controls	Cancer type	Sample size		HWE
ID	First author	Year	Country	Ethnicity	Source of controls	Cancer type	Case	Control	HWE
1	Tsai FJ	2005	China	Asian	PB	Bladder cancer	138	105	0.720
2	Tsai MH	2005	China	Asian	HB	Oral cancer	130	105	0.720
3	Lai KC	2005	China	Asian	Not shown	Gastric cancer	123	103	0.961
4	Kesarwani P	2008	India	Asian	HB	Prostate cancer	491	501	0.859
5	Konwar R	2009	India	Asian	HB	Breast cancer	100	200	0.001
6	Shekari M	2011	India	Asian	HB	Cervical cancer	200	200	0.406
7	Yang CM	2014	China	Asian	HB	OPSCC	592	623	0.146
8	Bozdogan T	2014	Turkey	Caucasian	HB	Bladder cancer	100	102	0.199

PB population-based controls; HB hospital-based controls; HWE Hardy-Weinberg equilibrium; OPSCC oral and pharyngeal squamous cell carcinoma.

ISSN: 1475-2867