Table IV. Univariate Cox regression analysis for overall survival (n=5781).

	Hazard ratio	95% Confidence interval	p-value
Age (years)	1.01	1.008–1.014	<0.001
Tumor location
Head	(Reference)	–	–
Body/Tail	1.09	0.99–1.19	0.09
Number of examined lymph nodes	0.99	0.986–0.994	<0.001
Lymph node status
Negative	(Reference)	–	–
Positive	1.41	1.33–1.51	<0.001
T-Stage
1/2	(Reference)	–	–
3/4	1.33	1.25–1.42	<0.001