Table 2. Preoperative factors of 40 patients with Engel class I surgical outcome (free of disabling seizures) versus Engel class II–IV (continued disabling seizures)a.
| Class I (n = 24) | Class II–IV (n = 16) | p-valueb | |
|---|---|---|---|
| Scalp EEG | |||
| Extratemporal/contralateral discharges | 4 | 7 | 0.04 |
| No extratemporal/contralateral discharges | 20 | 9 | |
| Ictal EEG | |||
| Type 1 pattern | 20 | 13 | 1.0 |
| Type 2 or 3 pattern | 4 | 3 | |
| SISCOM | |||
| Localized to resection | 18 | 9 | 0.04 |
| Not localized to resection | 1 | 5 | |
| PET | |||
| Localized to resection | 9 | 4 | 1.0 |
| Not localized to resection | 3 | 2 | |
| MRI re-review | |||
| Subtle concordant abnormality | 10 | 1 | 0.03 |
| No concordant abnormality | 14 | 15 | |
| Neuropsychological testing | |||
| Localized or lateralized to resection | 8 | 4 | 0.73 |
| Nonlateralized | 14 | 10 | |
| Side of resection | |||
| Dominant (average 36 mm resection) | 15 | 8 | 0.52 |
| Nondominant (average 42 mm resection) | 9 | 8 |
a
Excluded from this analysis if <1 year postoperative follow-up (four patients).
b
Fisher's exact test. Using the Bonferroni correction, significance requires p ≤ 0.007.