Table 3.

Log-rank Tests for Prognostic Factors Affecting Overall Survival

Factors	P-value
Gender	0.077
Age (≥ 65 y vs. < 65 y)	0.238
Treatment character (primary vs. recurrent)	0.725
No. of brain metastases (solitary vs. multiple)	0.189
Primary tumor (controlled vs. uncontrolled)	< 0.001
Extracranial metastasis (yes vs. no)	0.453
KPS (≥ 80 vs. < 80)	0.004
RPA class	0.093