Table 2. Univariate analysis of survival outcomes in patients with SVZ-involved tumors.

Characteristic	PFS			OS
	p	HR	95% CI	p	HR	95% CI
Age ≥40 years	0.024	2.259	1.116–4.574	0.047	2.093	1.009–4.338
Sex (Male)	0.718	1.149	0.541–2.441	0.781	1.118	0.508–2.462
KPS <80	0.375	1.543	0.592–4.024	0.351	1.584	0.603–4.160
Volume ≥60 cm3	0.043	2.145	1.025–4.492	0.030	2.349	1.085–5.084
CS ≤30 mm	0.061	1.977	0.970–4.027	0.026	2.353	1.108–4.919
Regions contacting SVZ
Frontal horn/others	0.850	1.070	0.528–2.171	0.700	1.156	0.554–2.409
<GTR	0.018	4.227	1.284–13.909	0.012	6.278	1.491–26.431
Radiation	0.504	0.747	0.318–1.756	0.333	0.652	0.275–1.548
Chemotherapy	0.752	1.139	0.508–2.553	0.618	1.232	0.544–2.789

CI, confidence interval; CS, the shortest distance from the tumor centroid to the edge of the lateral ventricles; GTR, gross total resection; HR, hazard ratio; KPS, Karnofsky Performance Status scale; OS, overall survival; PFS, progression-free survival; SVZ, subventricular zone.