| Abnormalities | Effective (%) | Focal epilepsy | Generalized epilepsy | p |
| Cerebral atrophy | 43 (28.5%) | 20 | 23 | 0.08 |
| Brain infract | 25 (16.6%) | 16 | 9 | 0.26 |
| Porencephalic cavities | 14 (9.3%) | 6 | 8 | 0.21 |
| Parenchymal calcifications | 10 (6.6%) | 3 | 7 | 0.08 |
| Hydrocephalus | 7 (4.6%) | 4 | 3 | 0.63 |
| Schizencephaly | 1 (0.7%) | 0 | 1 | 0.43 |
| Chronic empyema | 1 (0.7%) | 1 | 0 | 0.56 |