Table 1 Clinicopathological characteristics

Age, md (IQR)

62 (53–69)

58 (50–68)

71 (61–75)

0.015^b

Gender

0.176^c

 Women, n (%)

25 (42)

18 (38)

7 (64)

 Men, n (%)

34 (58)

30 (63)

4 (36)

BMI, md (IQR)

24 (22–27)

24 (22–27)

25 (24–28)

0.330^b

PSC (yes), n (%)

7 (12)

7 (15)

0 (0)

0.328^c

ASA ≥ 3 (missing data n = 1), n (%)

18 (31)

14 (30)

4 (36)

0.724^c

Bilirubin, micromol/L (missing data n = 3), md (IQR)

12 (8–20)

12 (8–20)

16 (10–21)

0.410^b

GPS ≥ 1 (missing data n = 11), n (%)

39 (81)

34 (83)

5 (71)

0.601^c

Radiology

0.297^c

 CT only, n (%)

38 (64)

29 (60)

9 (82)

 CT + MRI, n (%)

21 (36)

19 (40)

2 (18)

Preoperative biliary drainage (ERC/PTC), n (%)

56 (95)

46 (96)

10 (91)

0.260^c

Preoperative cholangitis, n (%)

10 (17)

9 (19)

1 (9)

0.669^c

PVE, n (%)

18 (31)

16 (33)

2 (18)

0.476^c

Bismuth-Corlette class, n (%)

0.004^c

 I

6 (10)

3 (6)

3 (27)

 II

13 (22)

7 (15)

6 (55)

 IIIa

27 (46)

25 (52)

2 (18)

 IIIb

7 (12)

7 (15)

0

 IV

6 (10)

6 (13)

0

Type of resection

0.028^c

 Right hemihepatectomy

4 (7)

4 (8)

0

 Extended right hemihepatectomy

38 (64)

31 (65)

7 (64)

 Left hemihepatectomy

3 (5)

3 (6)

0

 Extended left hemihepatectomy

6 (10)

6 (13)

0

 Bisegmentectomy 4b-5

3 (5)

0

3 (27)

 Isolated extrahepatic bile duct resection

5 (8)

4 (8)

1 (9)

Portal vein resection, n (%)

13 (22)

11 (23)

2 (18)

1.000^c

T ≥ 3, n (%) ^a

26 (45)

16 (33)

10 (91)

T4, n (%) ^a

5 (8)

3 (6)

2 (18)

N1 (missing data n = 3), n (%)

34 (61)

25 (56)

9 (82)

0.171^c

Pn1 (missing data n = 2), n (%)

55 (96)

44 (96)

11 (100)

1.000^c

LV1 (missing data n = 2), n (%)

49 (86)

38 (83)

11 (100)

0.332^c

R1, n (%)

50 (85)

42 (88)

8 (73)

0.347^c

Adjuvant therapy (missing data n = 11), n (%)

4 (8)

4 (10)

0 (0)

1.000^c