Table IV.

Univariate cox regression analysis.

Variable	Hazard ratio (95% CI)	P-value
Tumor volume	1.19 (1.05–1.35)	P=0.007
Melanoma vs. RCC	3.48 (1.08–11.23)	P=0.04
Age	1.01 (0.97–1.05)	P=0.7
ECOG score	1.20 (0.46–3.14)	P=0.7
KPS score	0.96 (0.89–1.02)	P=0.19
Chemotherapy	1.17 (0.0.38–3.53)	P=0.8
Pre-SRS WBRT	0.98 (0.30–3.26)	P=0.98

RCC, renal cell carcinoma; ECOG, Eastern Cooperative Oncology Group; KPS, Karnofsky performance status; WBRT, whole brain radiation therapy; SRS, stereotactic radiosurgery.