Median time to revision in both treatment groups
| Estimated time until x% of patients have experienced revision | ||
| VP shunt (n=26) | ETV (n=23) | |
| Percentage (X%) | Estimated time (d) (95% CI) | Estimated time (d) (95% CI) |
| 20% | 111 (6 to 257) | 23 (9 to 56) |
| 30% | 200 (40 to ∞) | 30 (10 to 84) |
| 40% | 298 (110 to ∞) | 62 (23 to 214) |
| 45% | 407 (127 to ∞) | 69 (23 to 501) |
∞, infinity; CI, confidence interval; ETV, endoscopic third ventriculostomy; VP shunt, ventriculoperitoneal shunt.