Table 1. Study characteristics of PE cases and controls in the analysis of VEGF polymorphisms.

Author [Ref.]	Year	Country	Ethnicity	Sources of controls	Number		Polymorphism(s)	Genotyping method	Association findings
					Case	CTR
Lu [10]	2017	China	Xanthoderm	HB	156	286	rs3025039	Snapshot	NS
Amosco [11]	2016	Philippines	Xanthoderm	HB	165	191	rs3025039 rs2010963	MassARRAY system	Supportive NS
Salimi [12]	2015	Iran	Caucasian	HB	192	186	rs2010963	PCR-RFLP	Supportive
Silva [13]	2015	Brazil	Caucasian	HB	79	210	rs2010963	PCR-RFLP	NS
Zhang Honghui [14]	2014	China	Xanthoderm	HB	58	70	rs3025039 rs2010963	Sequencing	Supportive NS
Procopciuc [15]	2014	Romania	Caucasian	HB	70	94	rs3025039	PCR-RFLP	Supportive
Chedraui [16]	2013	Ecuador	Indo-European hybrid	HB	31	31	rs3025039 rs2010963	Sequencing	NS
Andraweere [17]	2013	Australia	Caucasian	HB	174	168	rs3025039	MassARRAY system	NS
Atis [18]	2012	Turkey	Caucasian	HB	34	58	rs3025039	MassARRAY system	NS
Chen Baoli [19]	2011	China	Xanthoderm	HB	84	71	rs3025039	PCR-RFLP	Supportive
He Yun [20]	2011	China	Xanthoderm	HB	61	43	rs3025039 rs2010963	Sequencing	Supportive
Garza-Veloz [21]	2011	Mexico	Indo-European hybrid	HB	86	78	rs2010963	PCR-RFLP	NS
Cunha [22]	2010	Brazil	Caucasian	HB	52	28	rs3025039	PCR-RFLP	NS
Liu Shifang [23]	2010	China	Xanthoderm	HB	84	71	rs3025039	PCR-RFLP	Supportive
Huang Yuliang [24]	2009	China	Xanthoderm	HB	128	231	rs3025039	PCR-RFLP	Supportive
Sandrim [25]	2008	Brazil	Caucasian	HB	94	108	rs2010963	TaqMan-assays	NS
Nagy [26]	2008	Hungary	Caucasian	HB	71	93	rs2010963	real-time PCR	NS
Shim [27]	2007	Korea	Xanthoderm	HB	110	209	rs3025039	PCR-RFLP	Supportive
Kim [28]	2007	Korea	Xanthoderm	HB	223	237	rs3025039 rs2010963	Snapshot	NS
Banyasz [29]	2006	Hungary	Caucasian	HB	84	96	rs2010963	PCR-RFLP	Supportive
Papazoglou [30]	2004	Sweden	Caucasian	HB	42	73	rs3025039 rs2010963	PCR-RFLP	Supportive NS

Abbreviations: CTR, control; HB: hospital-based study; NS: non-significant.