Table 4.
Presurgical EEG features, seizure semiology, and seizure outcome in non-palliative cases (n=48*).
| n | Engel | P* | |||||
|---|---|---|---|---|---|---|---|
| I (%) | II (%) | III (%) | IV (%) | ||||
| Total | 48 | 40 (83) | 4 (8) | 3 (6) | 1 (2) | ||
| EEG background symmetry | .48 | ||||||
| Symmetric | 6 | 6 (100) | 0 | 0 | 0 | ||
| Asymmetric | 42 | 34 (81) | 4 (10) | 3 (7) | 1 (2) | ||
| EEG background abnormality | .51 | ||||||
| Abnormal unilaterally | 34 | 28 (82) | 2 (6) | 3 (9) | 1 (3) | ||
| Abnormal bilaterally | 13 | 11 (85) | 2 (15) | 0 | 0 | ||
| Interictal epileptiform EEG activity | .17 | ||||||
| Unifocal | 14 | 12 | 2 | 0 | 0 | ||
| Multifocal, unilateral | 20 | 18 | 1 | 1 | 0 | ||
| Multifocal, bilateral | 14 | 11 | 1 | 1 | 1 | ||
| Bilateral synchrony | 12 | 8 | 2 | 1 | 1 | .07 | |
| Ictal EEG onset | .79 | ||||||
| Unilateral | 35 | 28 | 4 | 3 | 0 | ||
| Bilateral | 8 | 7 | 0 | 0 | 1 | ||
| Not captured | 5 | 5 | 0 | 0 | 0 | ||
| Seizure semiology (vs. all others) | |||||||
| Simple partial | 33 | 28 | 2 | 2 | 1 | 1.0 | |
| Complex partial | 39 | 33 | 3 | 3 | 0 | .42 | |
| Generalized | 15 | 13 | 1 | 0 | 1 | 1.0 | |
*
Mantel-Haenszel chi-square test