Table 2. Univariate analysis showing the prognostic significance of clinicopathologic features on the outcomes of the 184 patients recruited in this study.

Variables	5-year OS		5-year LRC		5-year DFS
	%	P	%	P	%	P
Age		0.582		0.293		0.99
≤60	86.2		97.2		80.3
>60	82.8		92.1		79.1
Stage (AJCC)		0.021		0.725		0.035
	91.4		96.5		86.7
	79.4		94.6		73.6
N stage		0.002		0.125		<0.001
N0	91.4		96.5		86.7
N1	85.2		97.2		83.3
N2	69.2		89.9		56.0
T stage		0.712		0.807		0.636
T1–T2	77.6		91.7		80.5
T3–T4	86.6		96.7		80.1
Tumor grade		0.05		0.958		0.079
Well	83.1		94.7		78.2
Moderately	87.9		96.3		83.3
Poorly	71.1		91.7		64.9
Tumor nodules		0.015		0.295		0.056
No	87.8		95.9		82.1
Yes	70.1		93.0		68.8

Abbreviations: OS, overall survival; LRC, locoregional control; DFS, disease-free survival; AJCC, American Joint Committee on Cancer, 6^th edition