| Approaches | General conditions | Complications | Mortality | ||
| Improvement | No changes | Deterioration | |||
| Transcalosal 47 patients | 32 (68.1%) | 9 (19.1%) | 6 (12.8%) | 6 (12.8%) | 1 (2.1%) |
| Transcortical 45 patients | 28 (62.2%) | 8 (17.8%) | 9 (20%) | 10 (22%) | 2 (4.4%) |
| Bifrontal 22 patients | 14 (63.7%) | 5 (22.8%) | 3 (13.6%) | 6 (27%) | 1 (4.5%) |
| Shunting 17 patients | 11 (64.7%) | 2 (11.8%) | 4 (23.5%) | 4 (23.5%) | 2 (11.8%) |