Table 2. Univariate and multivariate analysis for disease-free survival.

Variable	Univariate analysis	Multivariate analysis
	P	95% CI	Exp(B)	P
Sex (Male vs Female)	0.317	0.790–1.963	1.245	0.346
Age (<60 years vs ≥60 years)	0.725	0.527–1.318	0.833	0.435
Smoking (Yes vs No)	0.791	0.780–2.058	1.267	0.338
Histology (SCC vs Adeno)	0.284	0.789–1.977	1.249	0.343
Differentiation (Poor vs Moderate vs Well)	0.763	0.743–1.411	1.024	0.884
Tumor size (≤3 cm vs >3 cm)	0.061	0.822–2.141	1.327	0.247
Lymph node metastasis (N0 vs N1 and N2)	0.092	0.630–2.694	1.303	0.475
TNM (Stage I vs Stage II and III)	0.109	0.514–2.344	1.097	0.810
THOP1 (High vs Low)	0.038	0.366–0.990	0.602	0.046

CI confidence interval.

SCC squamous cell cancer.

Adeno adenocarcinoma.