Actuarial analysis showing percentage of 450 NF1 patients free from optic nerve glioma for the time intervals shown
| Interval finish time (y) | Cumulative % free at end of period | 95% confidence interval |
|---|---|---|
| 5 | 98.1 | 96.8–99.4 |
| 10 | 96.3 | 94.4–98.2 |
| 15 | 95.6 | 93.5–97.7 |
| 20 | 94.8 | 92.5–97.1 |
| 25 | 93.8 | 91.1–96.5 |
| 25+ | 93.8 | 91.1–96.5 |