Table 4.

Multivariate analysis of overall survival by Cox proportional hazards model

Variable	Categories	Hazard ratio	SEM	P value
Age	> 45 years versus < 45 years	1.877	0.3796
Sex	Male versus female	1.216	0.4071
Differentiation	Poor versus others	2.361	0.2438	0.0217
Stage	I, II versus III, IV	2.973	0.1976	0.0012
VEGF	(+) versus (-)	1.164	0.3874
MVD	> 187.6 versus < 187.6	2.526	0.2126	0.0314

P < 0.05 vs Stage I, II group.