Table 1 Patient characteristics.

40

20

20

Age

median (years)

70.1

70.6

67.8

0.386^a

Sex

female

27

12

15

0.500^b

male

13

8

5

UICC stage

UICC I

1

0

1

0.825^b

UICC II

2

1

1

UICC III

19

11

8

UICC IV

8

5

3

UICC NA

10

3

7

Primary tumour

pT1

3

1

2

0.688^b

pT2

17

7

10

pT3

15

9

6

pT4

5

3

2

Lymph nodes

pN0

9

2

7

0.184^b

pN1

12

7

5

pNx

19

11

8

Metastasis

M0

34

16

18

0.661^b

M1

6

4

2

Perineural invasion

Pn0

29

13

16

0.480^b

Pn1

11

7

4

Lymphatic invasion

L0

24

10

14

0.333^b

L1

16

10

6

Vascular invasion

V0

34

16

18

0.661^b

V1

6

4

2

Resection

R0

15

6

9

0.227 ^b

R1

12

6

6

R2

6

5

1

Rx

7

3

4

Pre-existing hepatobiliary tract disease

yes

20

13

7

0.113^b

no

20

7

13