Table 5.

Multivariate analyses of predictors for postoperative seizure control^a

	OR and 95% CI	P
Multivariate model
Age: 18 y–54 y vs ≥55 y	1.74 (1.18–2.58)	.005
WHO grade: I vs II/III	1.01 (0.58–1.74)	.978
Tumor location convexity: yes vs no	1.40 (0.89–2.21)	.143
Radiographic extent of resection: gross total vs incomplete	0.89 (0.55–1.45)	.639
Tumor progression: yes vs no	1.92 (1.16–3.18)	.012
Preoperative epilepsy: yes vs no	3.46 (2.32–5.16)	<.001
Variables tested as additional single variablesb
Improvement of preoperative neurologic deficits: yes vs no	0.46 (0.25–0.85)	.013
Epileptic dischargesc: yes vs no	2.52 (1.36–4.67)	.003
Edema before surgeryd: yes vs no	1.63 (1.02–2.61)	.039
Surgical complications
Sensorimotor deficits: yes vs no	1.80 (1.05–3.09)	.033
CNS infections: yes vs no	5.89 (1.53–22.61)	.010
Hydrocephalus: yes vs no	3.27 (1.35–7.95)	.009
Recraniotomy for any reason: yes vs no	2.91 (1.25–6.78)	.013
Radiographic intracranial hemorrhage: yes vs no	1.51 (0.97–2.31)	.058
Symptomatic intracranial hemorrhage: yes vs no	2.60 (1.17–5.76)	.018

Abbreviations: CI, confidence interval; OR, odds ratio.

^aN = 623 patients with complete datasets.

^bFurther variables are mentioned in the text.

^cPostoperative EEG recordings (N = 340).

^dDocumentation available for 690 patients (CT/MRI = 629/61).