Table 2.

Multivariate analysis of prognostic factors and predictive scores.

Variables	Regression coefficient	Standard error	Hazard Ratio	95% CI	p-value	Score
Gender
Female	Reference					0
Male	0.351	0.101	1.42	1.166–1.729	> 0.001	1
ECOG
0–2	Reference					0
3–4	0.260	0.104	1.30	1.056–1.591	0.013	1
Histological subtype
Small cell	Reference
Non-small cell	0.035	0.207	1.42	0.945–2.131	0.091	–