Table 2.

Cox regression analysis of factors associated with baseline brain metastases (n = 104).

Variable	Univariable analysis P-value	Multivariable analysis
		Hazard ratio [95% CI]	P-value
Sex (female vs. male)	0.001	0.210 [0.074–0.597]	0.003
Age (≥65 vs. <65 years)	0.077	0.274 [0.049–1.516]	0.138
Smoking history (yes vs. no)	0.486	1.578 [0.488–5.101]	0.446
ECOG PS at baseline (<2 vs. ≥2)	0.157	0.415 [0.029–5.924]	0.516
Adenocarcinoma (yes vs. no)	0.054	NA	0.999