Figure 1. Distribution of serum VEGF
concentrations within the groups. Boxplot analysis showing increased
serum levels of vascular endothelial growth factor (VEGF) in patients
with diabetes mellitus (DM) compared to control subjects. The median
serum VEGF levels were higher in diabetic subjects with retinopathy
than those without. Abbreviations: DR(-) represents patients without
diabetic retinopathy.