Severity of diabetic retinopathy in relation to duration of diabetes mellitus
| Duration (years) | Mild NPDR | p Value | Moderate NPDR | p Value | Severe NPDR | p Value | PDR | p Value | CSME | p Value | Any DR | p Value |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| <5 | 16 (2.7) | 0.001 | 23 (3.9) | <0.001 | 6 (1.0) | <0.0001 | 4 (0.7) | 0.008 | 13 (2.2) | 0.046 | 49 (8.3) | <0.001 |
| 5–10 | 5 (3.1) | 13 (8.1) | 6 (3.8) | 5 (3.1) | 5 (3.1) | 29 (18.1) | ||||||
| 10–15 | 6 (7.6) | 7 (8.9) | 8 (10.1) | 1 (1.3) | 1 (2.5) | 22 (27.8) | ||||||
| ≥15 | 2 (5.7) | 6 (17.1) | 4 (11.4) | 1 (2.9) | 4 (11.4) | 13 (37.1) |
CSME, clinically significant macular edema; NPDR, non-proliferative diabetic retinopathy.