The plasma level of VEGF-A differed significantly [15.47 (11.40–25.92) vs. 27.64 (20.62–35.32) vs. 24.85 (18.59–33.54) pg/ml, P < 0.001], with the level of VEGF-A in NPDR and PDR groups significantly higher than that in the DM group (PNPDRvs. This evidence concerns the gene VEGFA and diabetes mellitus.