| Antibiotic Duration | Craniotomy | Burr Hole |
| 0 - 15 days | 4 | 0 |
| 16 - 30 days | 2 | 2 |
| 31 - 45 days | 21 | 22 |
| 46 - 60 days | 1 | 1 |
| More than 60 days | 1 | 0 |
| Total | 29 | 25 |