Table 2.

Multivariate Cox regression analysis of clinical characteristics.

Variable	Coefficient	HR	Lower.95	Upper.95	P value
Age ≥ 65	0.464	1.590	0.896	2.822	0.113
Grade 2	2.070	7.927	1.009	62.253	0.049
Grade 3	2.074	7.954	1.070	59.142	0.043
Stage II	0.611	1.843	0.771	4.404	0.169
Stage III	0.818	2.265	1.173	4.374	0.015
Stage IV	1.406	4.080	1.749	9.517	0.001
High-risk group	0.866	2.377	1.255	4.502	0.008