Table 2.
Probability of Remaining Free of STDR Based on the Classification at Baseline (No DR or Mild NPDR)
| Time from baseline (years) | Number entering time interval | Number of patients reaching STDR | Probability of remaining free of STDR (95% CI) |
|---|---|---|---|
| No DR (n = 286) | |||
| 1 | 286 | 0 | 1.00 |
| 2 | 274 | 2 | 0.99 (0.96–0.99) |
| 3 | 224 | 1 | 0.98 (0.95–0.99) |
| 4 | 154 | 1 | 0.97 (0.94–0.99) |
| 5 | 82 | 6 | 0.87 (0.76–0.93) |
| 6 | 23 | 0 | 0.87 (0.76–0.93) |
| Mild NPDR (n = 144) | |||
| 1 | 144 | 1 | 0.99 (0.95–1.00) |
| 2 | 134 | 6 | 0.94 (0.88–0.97) |
| 3 | 92 | 10 | 0.81 (0.72–0.88) |
| 4 | 50 | 8 | 0.65 (0.52–0.76) |
| 5 | 24 | 4 | 0.49 (0.33–0.65) |
| 6 | 5 | 0 | 0.49 (0.33–0.65) |