Fig. 1

Serum concentrations of uric acid in groups with different stage of DR (A) and CKD (B). The average serum uric acid (SUA) level increased as the severity of DR and CKD increased. DR: Diabetic Retinopathy; NDR: Non-Diabetic Retinopathy; VTDR: Vision-Threatening Diabetic Retinopathy; CKD: Chronic Kidney Disease; CKD1: Stage 1 CKD; CKD2: Stage 2 CKD; CKD3: Stage 3 CKD; ns: Non-Significant; *: p < 0.05; ***p < 0.001; ****:P < 0.0001