Study Country Ethnicity Sample size Genotype frequency in cases Genotype frequency in controls P HWE Cases Controls GG GC CC GG GC CC   Awata,2005 [6] Japan East Asian 175 200 46 91 38 75 95 30 Yes Buraczynska,2007 [7] Poland European 195 91 88 88 19 42 41 8 Yes Errera,2007 [12] Brazil European 167 334 57 73 37 139 155 40 Yes Petrovic,2008 [13] Slovenia European 206 143 79 103 24 61 67 15 Yes Uthra,2008 [14] India South Asian 120 79 60 51 9 44 29 6 Yes Nakamura,2009 [9] Japan East Asian 176 289 63 79 34 84 146 59 Yes Kangas-Kontio,2009 [15] Finland European 126 96 74 42 10 52 39 5 Yes Chun,2010 [10] Korea East Asian 253 134 85 125 43 43 69 22 Yes Feghhi,2011 [16] Iran European 119 279 43 49 27 63 139 77 Yes Yang,2011 [11] China East Asian 129 137 36 74 19 39 72 26 Yes

Table 2: Characteristic of the studies included in the meta-analysis between rs2010963 polymorphism in the VEGFA gene and diabetic retinopathy.