Table 3.

Seizure outcome by preoperative EEG

	N	Seizure free (%)	Favorable outcome (%)
Interictal background activity
Normal	8	1 (13)	6 (75)
Abnormal	8	1 (13)	6 (75)
Statistical test*		p=1	p=1
Interictal epileptiform discharge
BI only	3	1 (33)	2 (67)
G only	3	0 (0)	2 (67)
BI with G	10	1 (10)	8 (80)
Statistical test†		p=0.22	p=0.47
Ictal epileptiform discharge
Spike only	7	0 (0)	6 (86)
Delta only	1	0 (0)	1 (100)
Spike with delta	3	1 (33)	1 (33)
Statistical test†		p=0.13	p=0.41
Followed by attenuation	4	0 (0)	2 (50)
Not followed by attenuation	7	1 (14)	6 (86)
Statistical test*		p=0.39	p=0.20

BI, bilaterally independent epileptiform discharge; G, generalized epileptiform discharge.

^*Mann-Whitney U test.

^†Kruskal-Wallis test.