Long-term survival of more than 3 years among patients with advanced non-small cell lung cancer treated with chemotherapy

Table 2 Univariate and multivariate analysis in overall survival in all patients

Variables		Univariate analysis(log-rank test)P value	Multivariate analysis(Cox’s proportional hazard models)P value
Age (yr)	< 65/≥ 65	0.4158	0.5172
Gender	Male/Female	< 0.0001	0.0982
PS	0-1/2-4	< 0.0001	< 0.0001
Smoking	Yes/No	< 0.0001	0.1363
Histology	AC/Non-AC	< 0.0001	< 0.0001
Clinical stage	IIIB/IV	0.2151	0.5216

PS: Performance status; AC: Adenocarcinoma.