Table 2.

The results of the multivariate analysis of the patient characteristics predicting survival (Cox proportional hazards analysis)

Variables		Hazard ratio	95% Cl	P-value
Age	>70 years	1.145	0.649–2.012	0.64
Gender	Male	0.545	0.230–1.524	0.23
Smoking status	Current	1.019	0.546–1.888	0.95
Clinical stage	II or III	0.546	0.258–1.145	0.11
Pathological stage	II or III	3.101	1.543–6.216	0.0016
Surgical procedure	Pneumonectomy	6.345	2.127–17.02	0.0017

CI, confidence interval.