Table 3.

Multivariate analysis of factors associated with OS and DFS

	OS			DFS
	P-value	HR	95% CI	P-value	HR	95% CI
Metastatic lymph node ratio	0.008	2.560	1.275–5.143	0.013	2.404	1.202–4.809
Positive nodes (n>0)	0.799	1.089	0.565–2.097	0.995	1.019	0.527–1.970
Depth of primary tumor invasion	0.029	1.806	1.063–3.070	0.021	1.900	1.101–3.279
Size of primary tumor	<0.001	2.771	1.663–4.617	<0.001	2.854	1.714–4.753
Stage (IIB)	0.034	1.825	1.046–3.183	0.032	1.832	1.052–3.188
Radiotherapy	0.001	0.463	0.292–0.735	0.002	0.485	0.306–0.768

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