Table 2. Multivariate COX regression analysis of the prognostic model in the training set and validation set.

Variables	GSE39582				TCGA
	HR	95% CI	P		HR	95% CI	P
Age (>65 vs. ≤65)	1.75	1.29–2.37	3.32×10−4		3.08	1.91–4.98	4.20×10−6
Risk (high-risk vs. low-risk)	2.27	1.69–3.13	8.15×10−8		1.75	1.15–2.70	9.32×10−3
Gender (male vs. female)	1.50	1.12–2.01	5.07×10−3		1.00	0.66–1.53	9.92×10−1
Stage	1.96	1.60–2.39	6.69×10−11		2.04	1.59–2.63	3.20×10−8