Association between VEGF Gene Polymorphisms and the Susceptibility to Lung Cancer: An Updated Meta-Analysis

Table 1

Baseline characteristics of studies associated with the risk of lung cancer included in the meta-analysis.

Year	Surname	Ethnicity	Country	SOC	Genotyping	Cases	Controls	Gene polymorphism
2017	Yamamoto	Japan	Asian	HB	TaqMan	462	379	-460C/T
2017	Naikoo	India	Asian	PB	PCR-RFLP	112	116	+936C/T
2017	Naykoo	India	Asian	PB	PCR-RFLP	199	401	+936C/T, -2578C/A
2015	Krupnova	Belarus	Caucasian	HB	PCR-RFLP	202	336	+936C/T, -2578C/A
2015	Liu	China	Asian	PB	PCR-RFLP	414	338	-460C/T, -2578C/A
2014	Deng	China	Asian	HB	PCR-RFLP	65	110	-2578C/A
2013	Sun	China	Asian	PB	PCR-RFLP	126	160	-460C/T
2013	de Mello	Portugal	Caucasian	HB	MassARRAY	144	144	+936C/T, -460C/T, -2578C/A
2012	Naik	India	Asian	PB	PCR-RFLP	100	150	+936C/T
2012	Li	China	Asian	PB	PCR-RFLP	150	150	+936C/T, -2578C/A
2009	Liang	China	Asian	PB	PCR-RFLP	171	172	+936C/T, -2578C/A
2008	Zhai	America	Caucasian	HB	TaqMan	1900	1458	+936C/T, -460C/T
2005	Lee	Korea	Asian	PB	PCR-RFLP	432	432	+936C/T, -460C/T

SOC: source of control; HB: hospital-based; PB: population-based controls.