| Factor | ETV Success | |
| Age | <10 months | 70.6% |
| 10 - 24 months | 77.8% | |
| 2 - 18 years | 66.7% | |
| >18 years | 66.7% | |
| Etiology | Malformation (36) | 72% |
| Tumor (11) | 60% | |
| Infection (16) | 26% | |
| Hemorrhage (1) | 0% | |