Table 5.

Survival Analysis for Subgroup of Patients with N1

Group	Short Time Interval (n=325)		Long Time Interval (n=286)		P value
	5-Year	10-Year	5-Year	10-Year
OS	93.6%	83.7%	90.2%	83.2%	0.429*
DFS	89.7%	78.9%	84.5%	75.9%	0.124*

Note: *Calculated by Kaplan–Meier method.

Abbreviations: OS, overall survival; DFS, disease-free survival.