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Table 1 Characteristics of study groups

From: Serum vascular endothelial growth factor is a biomolecular biomarker of severity of diabetic retinopathy

S. no Characteristic Controls (n = 40) No DR (n = 38) NPDR (n = 38) PDR (n = 40)
1. Age (years) (mean ± SD) 52.95 ± 7.49 52.11 ± 5.84 55.21 ± 4.78 53.58 ± 6.87
2. Gender
 Male 26 24 26 25
 Female 14 14 12 15
3. Duration of diabetes in years (mean ± SD) 0 7.16 ± 6.04 10.26 ± 5.82 11.08 ± 4.55
4. Glycated Hb (%) (mean ± SD) 5.35 ± 0.1 7.42 ± 0.19 8.48 ± 0.28 8.90 ± 0.18
5. Central subfield thickness (mean ± SE) 247.9 ± 2.6 251.7 ± 4.3 304.7 ± 22.5 455.9 ± 19.36
6. S. urea (mg/dl) 33.26 ± 0.8 38.03 ± 2.1 37.96 ± 0.9 39.89 ± 1.1
7. S. creatinine (mg/dl) 0.96 ± 0.01 1.12 ± 0.02 1.11 ± 0.02 1.61 ± 0.01