Table 1 Patient characters

Age^a

60 [26–82]

60 [32–79]

Gender/male (%)

266 (56.5)

65 (47.1)

Pre-operative CA 19-9 level (U/ml)^a

199 [5.97–3015.17]

155.8 [11.7–1000]

Pre-operative CA 125 level (U/ml)^a

22.5 [1.23–456.2]

22.0 [2.53–171.4]

Pre-operative CEA level (ng/ml)^a

3.37 [0.2–113.5]

2.65 [0.2–113.5]

Pre-operative TB level (μmol/l)^a

167.5 [1.9–753.1]

27.5 [1.9–34.2]

Pre-operative ALT level (U/l)^a

102 [8–772]

86.5 [10–720]

Pre-operative AST level (U/l)^a

90 [11–1016]

83 [11–523]

Pre-operative Albumin level (g/l)^a

37.2 [18.7–51.8]

38.2 [28.8–50.1]

Tumor size (cm)^a

3 [0.8–15]

2.8 [0.8–6]

Preoperative biliary drainage (%)

220 (46.7)

20 (14.5)

Bismuth–Corlette classification (%)

 Type I and II

233 (49.5)

77 (55.3)

 Type III and IV

238 (50.5)

61 (44.2)

T stage (AJCC) (%)

 T1 and T2

218 (46.3)

82 (59.4)

 T3 and T4

253 (53.7)

56 (40.6)

Surgical procedures (%)

 Resected

309 (65.6)

98 (71.0)

 Unresected

162 (34.4)

40 (29.0)

 Postoperative complications (%)

137 (29.1)

32 (23.2)