Diabetic retinopathy by duration of diabetes
| Duration of diabetes (n= 1954*) | Present (312) | Absent (1642) | Total | χ2 test 162.5 | |||
|---|---|---|---|---|---|---|---|
| *Information of duration of diabetes was missing in 295 subjects (53 with retinopathy and 242 without retinopathy). | |||||||
| <5 years | 124 | 9.0 | 1187 | 85.8 | 1384 | df = 3 | |
| 6–10 years | 111 | 22.8 | 350 | 71.9 | 487 | p=<0.001 | |
| 11–15 years | 45 | 35.7 | 73 | 57.9 | 126 | ||
| 16 years and more | 32 | 47.1 | 32 | 47.1 | 68 | ||
| National | 365 | 1884 | |||||