Table 2.

Survival Analysis

Factor	P value§	HR (95% BCa CI) §§
Age (<60)	0.801	0.854 (0.043- 2.595)
Clinical stage (T1-T2)	0.007*	0.104 (0.021-0.350)
Lymph node (positive)	0.163	1.856 (0.701-5.030)
EGFR (overexpression)	0.122	0.500 (0.191- 1.189)
Smoking (yes)	0.198	0.455 (0.034- 22.261)

^§§, Cox regression univariate analysis;

^§, Log-rank test; HR, Hazard ratio;

^*, Statistical significant.