Table 3.

The univariate and multivariate Cox regression analyses in the training, testing, and entire groups.

Variable	Univariate analysis			Multivariate analysis
	HR	HR.95L-HR.95H	p	HR	HR.95L-HR.95H	p
Training set (n = 172)
Age (<=65/>65)	1.005	0.983–1.027
Gender (Female/male)	0.870	0.480–1.578
Grade (G1–G4)	0.802	0.535–1.204
Stage (I–IV)	1.776	1.293–2.440	<0.001	1.665	1.205–2.300	0.002
Risk score	1.131	1.087–1.177	<0.001	1.123	1.077–1.170	<0.001
Testing set (n = 171)
Age (<=65/>65)	1.006	0.986–1.026
Gender (Female/male)	0.696	0.413–1.174
Grade (G1–G4)	1.460	1.037–2.056
Stage (I–IV)	1.783	1.339–2.375	0.030	1.609	1.160–2.205	0.002
Risk score	1.009	0.980–1.038	<0.001	1.229	1.172–1.280	<0.001
Entire set (n = 343)
Age (<=65/>65)	1.005	0.991–1.020
Gender (Female/male)	0.758	0.513–1.118
Grade (G1–G4)	1.121	0.865–1.454
Stage (I–IV)	1.808	1.463–2.234	<0.001	1.775	1.436–2.194	<0.001
Risk score	1.028	1.010–1.047	0.003	1.025	1.005–1.046	0.002

HR, hazard ratio. Bold value means p< 0.05.