Table 2. Univariate analysis of prognostic factors in pancreatic head carcinoma.

Variables	n	5-year survival rate (%)	P-values
Age (years)
Over 65	45	10.0	0.3578
Under 64	30	8.9
Gender
Male	50	10.0	0.8857
Female	25	0.0
pT
pT1, 2	8	37.5	0.0470
pT3, 4	67	5.5
pN
Negative	28	20.0	0.0036
Positive	47	2.8
Liver metastasis
Negative	47	13.1	0.1522
Positive	28	3.6
pStage
I, II	65	11.0	0.0136
III, IV	10	0.0
Lymphatic invasion
Negative	9	33.3	0.0297
Positive	66	6.4
Venous invasion
Negative	19	15.8	0.3625
Positive	56	6.7
Microvessel density
Low grade	33	10.6	0.1822
High grade	42	9.5
Midkine expression
Negative	35	19.3	0.0073
Positive	40	0.0