Table 2 Patient demographics and clinicpathological characteristics

Age(mean ± SD)

59.9 ± 7.9

63.6 ± 10.4

0.287^*1

Gender(male/female)

8/9

6/5

1.000^*2

Operative procedures PD/DP/TP

13/3/1

10/1/0

1.000^*2

Portal vein resection

70.6% (12/17)

63.6% (7/11)

1.000^*2

cT(1/2/3/4)

0/0/17/0

0/0/11/0

1.000^*2

cN(0/1)

11/6

6/5

0.701^*2

pT(0/1/2/3/4)

0/1/16/0

0/0/11/0

1.000^*2

pN(0/1)

13/4

5/6

0.125^*2

Histological classification G1-2/G3/ungradeable

11/5/1

8/3/0

1.000^*2

Residual tumor R0/R1-2

17/0

9/2

0.146^*2

Tumor destruction (Evan’s criteria)I/IIa/IIb/III/IV

1/7/7/2/0