TABLE 1.

Multivariate analysis of factors affecting the overall survival of 112 patients with lymph node-negative metastasis

Variable	Hazard ratio	95% CI	P
Sex	0.203	0.079–0.520	0.001
Operative type	0.343	0.126–0.929	0.035
Presence of serosal involvement	0.098	0.028–0.349	<0.001