Table III.

Cox multivariate 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	3.747	1.765	7.957	<0.001
Tobacco smoking history	0.585	0.344	0.995	0.048
Neoplasm recurrence	1.486	0.871	2.535	0.146
M stage	3.026	0.550	16.640	0.203
TNM stage	1.711	0.658	4.451	0.271
T stage	0.838	0.325	2.161	0.714

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