Table 3.

Univariate analysis with Cox proportional hazard model.

	Overall survival		Progression-free interval
Covariates	HR (95% CI)	P value	HR (95% CI)	P value
Age(≤65 vs. >65)	2.739(1.321–5.679)	0.007	2.267(1.005–5.114)	0.049
Histological grade
G1	1		1
G2	2.779(0.375–20.58)	0.317	1.064(0.245–4.611)	0.934
G3	3.198(0.426–23.92)	0.258	2.281(0.536–9.701)	0.264
Clinical stage
Stage I	1		1
Stage II	0.521(0.183−1.478)	0.220	0.479(0.169–1.359)	0.166
Stage III	1.399(0.642–3.049)	0.398	0.873(0.338–2.253)	0.779
Stage IV	2.998(1.048–8.568)	0.041	2.651(0.805–8.731)	0.109
N stage(N0 vs.N1)	2.185(1.227–3.889)	0.008	1.688(0.905–3.149)	0.100
T stage
T1	1		1
T2	0.764(0.354−1.649)	0.493	0.548(0.229–1.311)	0.177
T3	1.582(0.378–6.616)	0.530	2.104(0.503–8.799)	0.308
T4	38.822(7.647–197.092)	<0.001	18.233(3.935–84.496)	<0.001
11-IRG risk score(low vs. high)	2.893(1.579–5.299)	<0.001	2.567(1.364–4.831)	0.003

HR: hazard ratio; CI: confidence interval.