Table 2.

Univariate and multivariate Cox proportional hazard model analysis in the training cohort.

Characteristic	Univariate analysis			Multivariate analysis
	HR	95% CI	P value	HR	95% CI	P value
Age			P < 0.001			0.002
< 65	Ref			Ref
≥ 65	1.955	1.330–2.874		1.877	1.271–2.772
Gender			0.085			0.021
Female	Ref			Ref
Male	1.530	0.939–2.471		1.781	1.091–2.908
Location			0.630
Upper	Ref
Middle	0.803	0.401–1.612
Low	0.971	0.465–2.025
Grade			0.188
Poor	Ref
Well	0.765	0.511–1.141
Length (cm)			0.022			0.031
> 2	Ref			Ref
≤ 2	0.502	0.276–0.915		0.515	0.282–0.941
Lymph node harvested			0.045			0.042
> 10	Ref			Ref
≤ 10	1.514	1.006–2.277		1.538	1.016–2.328
Radiotherapy			0.613
No	Ref
Yes	1.139	0.687–1.889
Chemotherapy			0.162
No	Ref
Yes	1.338	0.690–2.012