Table 1.

Multivariate Cox proportional-hazard models for OS and DSS.

	OS		DSS
Variables	HR (95% CI)	P value	HR (95% CI)	P value
Age (years)		0.018		<0.001
<1	Reference		Reference
1	0.903 (0.345–2.358)	0.834	0.404 (0.144–1.129)	0.084
2	0.307 (0.115–0.817)	0.018	0.122 (0.041–0.362)	<0.001
3	0.373 (0.145–0.957)	0.040	0.136 (0.046–0.405)	<0.001
4	0.171 (0.042–0.694)	0.014	0.074 (0.017–0.318)	<0.001
5	0.228 (0.078–0.666)	0.007	0.099 (0.031–0.316)	<0.001
Radiotherapy
No	Reference		Reference
Yes	0.407 (0.206–0.805)	0.010	0.395 (0.191–0.814)	0.012
Chemotherapy
No	Reference		Reference
Yes	0.311 (0.144–0.671)	0.003	0.272 (0.123–0.600)	0.001

CI: Confidence interval; DSS: Disease-specific survival; HR: Hazard ratio; OS: Overall survival.