Change of Vascular Endothelial Growth Factor Levels following Vitrectomy in Eyes with Proliferative Diabetic Retinopathy

Figure 1

Vitreous VEGF levels at baseline and after vitrectomy. In any group, postoperative VEGF levels were significantly lower than baseline VEGF levels. This box and whisker plot shows the distribution of data into quartiles (box) with the median (dash line), the mean (cross mark), the minimum and maximum (whiskers), and the outliers (dot), which were the two eyes with even higher postoperative VEGF level than baseline.