Table II.

Cox univariate regression analysis between prognostic risk scores/clinical characteristics and overall survival of patients.

Risk scores/clinical characteristics	Hazard ratio	Lower.95	Upper.95	P-value
Risk score	2.718	1.720	4.297	<0.001
Neoplasm recurrence	2.479	1.594	3.856	<0.001
TNM stage	2.254	1.402	3.625	<0.001
Tobacco smoking history	0.633	0.421	0.951	0.028
M stage	3.637	1.137	11.635	0.030
T stage	1.663	1.030	2.686	0.038
Target molecular therapy	0.689	0.409	1.160	0.161
Residual tumor	1.215	0.821	1.799	0.331
Radiotherapy	1.349	0.731	2.489	0.338
N stage	1.188	0.781	1.806	0.421
Gender	1.200	0.744	1.935	0.455
Age	1.016	0.671	1.538	0.939

T, tumor; N, node; M, metastasis.