Table III.

Univariate and multivariate analysis of PFS and OS.

	PFS				OS
	Univariate	Multivariate survival analysis			Univariate	Multivariate survival analysis
Clinicopathological characteristics	P-value	HR	95% CI	P-value	P-value	HR	95% CI	P-value
Sex	0.385				0.584
Drinking	0.536				0.617
Smoking	0.029	1.022	0.496–2.104	0.954	0.040	0.826	0.408–1.671	0.594
Age at diagnosis	0.001	1.595	0.835–3.045	0.157	0.002	1.190	0.597–2.370	0.621
Tumor size	0.019	1.725	0.936–3.176	0.080	0.016	1.659	0.860–3.198	0.131
Lymph node metastasis	<0.001	1.603	0.868–2.960	0.132	0.001	1.612	0.831–3.129	0.158
Clinical stage	<0.001	2.349	1.268–4.352	0.007	<0.001	2.028	1.075–3.826	0.029
Resistin expression	0.002	1.856	1.003–3.436	0.049	0.007	1.895	1.005–3.574	0.048
Chemoradiotherapy	<0.001	0.059	0.013–0.256	<0.001	<0.001	0.027	0.004–0.210	0.001

PFS, progression-free survival; OS, overall survival; HR, hazard ratio; CI, confidence interval.