Table 1.

Descriptive Statistics on Variables of Interest

Covariate	Levels	N (%)
Age (N, mean ± SD, median (min, max)		148, 42.2 ± 10.4, 42.5 (20, 72)
Gender	Male	78 (52.7%)
	Female	70 (47.3%)
Tumor Location	Frontal	88 (59.5%)
	Insula	7 (4.7%)
	Temporal	32 (21.6%)
	Parietal/Occipital	21 (14.2%)
Surgery Type	Partial	96 (64.9%)
	Gross-total	52 (35.1%)
Histology	Astrocytoma	85 (59%)
	Oligodendroglioma	48 (33.3%)
	Oligoastrocytoma	11 (77.7%)
No. of AEDs preop (N, mean ± SD, median (min, max)		148, 0.9 ± 0.6, 1 (0, 3)
	0	31 (21.0%)
	1	102 (68.9%)
	>2	15 (10.2%)
No. of AEDs Postop (N, mean ± SD, median (min, max)		148, 1.1 ± 0.7, 1 (0, 3)
	0	22 (14.9%)
	1	91 (61.5%)
	>2	35 (23.6%)
Seizure Frequency 6 Months Preop	None	32 (21.6%)
	Single	54 (36.5%)
	Few	23 (15.5%)
	Several	39 (26.4%)
Seizure Frequency 6 Months Postop	None	98 (66.2%)
	Single	14 (9.5%)
	Few	19 (12.8%)
	Several	17 (11.5%)
Seizure Frequency Change from 6 Months Prior To/After Surgery	None/Single → None/Single	69 (46.6%)
	None/Single → Few/Several	17 (11.5%)
	Few/Several → None/Single	43 (29.1%)
	Few/Several → Few/Several	19 (12.8%)

Abbreviations: AEDs, antiepileptic drugs; min, minimum; max, maximum; Postop, postoperatively; preop, preoperatively; SD, standard deviation.