Table 3.

Survival-related factors on OS in multivariate analysis (Training set).

Factors	B value	P value	Hazard Ratio	95%CI
Smoking (yes vs. no)	0.568	0.009*	1.765	1.154 ∼ 1.699
SM (- vs. + )	0.763	0.001*	2.145	1.393 ∼ 3.302
Loss of weight (yes vs. no)	0.649	0.005*	1.914	1.214 ∼ 3.018
Albumin (reduced vs. normal)	0.506	0.019*	1.658	1.087 ∼ 2.531
Primary site treatment status (no vs. yes)	0.589	0.015*	1.803	1.119 ∼ 2.903

SM^-: EGFR unsensitive mutations/KRAS mutation/no mutation; SM⁺: EGFR-sensitive mutations/ALK mutation.

*: p value < 0.05 considered statistically significant.