Table 2.

Characteristics of patients requiring invasive EEG monitoring.

	Invasive EEG required	Invasive EEG not required
Frequency	19	77
SelAH procedure	1	20
ATL procedure	18	57
Gender (%female)	9 (47%)	45 (58%)
Age at surgery (Year)	37.2	40.9
Initial EEG lateralizing/localizing (%)	9 (47%)	47 (62%)
MRI concordance	14 (72%)	67 (87%)
Multifocal spikes in EMU∗	18 (95%)	19 (25%)
Bilateral interictal abnormalities in EMU (%)∗	9 (47%)	13 (17%)
Average duration of seizure freedom (months)∧	18.1	13.7

*P < 0.05.

^∧ P = 0.08.

EEG: electroencephalography; EMU: Epilepsy Monitoring Unit.