Table 2.

The univariate and multivariate Cox analyses results of overall survival (OS) related factors.

Characteristics	Hazard ratio	CI95	P value	Hazard ratio	CI95	P value
Age	1.02	1.01–1.03	.001	1.02	1.01–1.04	<.001
Gender	1.29	0.95–1.75	.098	NA	NA	NA
T stage	1.9	0.97–3.72	.061	NA	NA	NA
N stage	0.59	0.44–0.8	.001	1.04	0.55–1.98	.904
M stage	5.23	3.63–7.53	<.001	2.5	1.07–5.85	.035
AJCC stage	2.1	1.71–2.6	<.001	1.38	0.74–2.54	.308
Risk model	2.72	2.26–3.27	<.001	2.26	1.87–2.74	<.001

AJCC = American Joint Committee on Cancer.