TABLE 3.

Univariate and multivariate Cox regression analyses in the training group.

Variable	Univariate analysis			Multivariate analysis
	p	Hazard ratio	95% Confidence interval	p	Hazard ratio	95% Confidence interval
Age (≥60/< 60)	0.694	1.116	0.647–1.925
Sex (female/male)	0.854	0.948	0.539–1.669
AJCC stage (IV+III/II+I)	0.001	2.705	1.540–4.751	0.005	2.278	1.284–4.041
Histologic grade (G4+G3/G2+G1)	0.874	1.045	0.606–1.803
Risk score (high/low)	< 0.001	3.301	1.883–5.787	< 0.001	2.942	1.671–5.179

Bold font means P < 0.05.