Factors	Univariate analysis		Multivariate analysis
Factors	HR	P	HR	P
Age	0.983	0.584	0.970	0.354
Sex	0.490	0.129	0.761	0.715
Tumor size	1.848	0.272	0.535	0.396
CEA	4.181	0.002	1.294	0.748
Risk group	6.967	<0.001	10.971	<0.001