Table 2 Logistic regression of preoperative parameters for non-resectability due to technical reasons

Demographics

 Sex (male = 1)

0.1

 Age (≤ 70 years = 1)

2.43 (1.15–5.16)

0.019

3.76 (1.56–9.08)

0.003

 BMI (≤ 25 kg/m² = 1)

0.561

 Bismuth type (I/II = 1)

0.087

 Neoadjuvant therapy (no = 1)

0.636

 Preoperative MR-Imaging (no = 1)

0.666

 PVE (no = 1)

5.48 (1.62–18.57)

0.001

5.73 (1.61–20.38)

0.007

 ASA (I/II = 1)

0.401

 Preoperative cholangitis (no = 1)

0.84

 EBD (no = 1)

0.909

 PBD (no = 1)

0.315

 Portal vein infiltration > 180° (no = 1)

0.139

 Arterial infiltration > 180° (no = 1)

5.2 (2.41–11.22)

 < 0.001

8.05 (3.32–19.53)

 < 0.001

 Lobar atrophy (no = 1)

0.765

 sFLR (≤ 40% = 1)

0.468

Clinical chemistry

 Albumin (≤ 35 g/l = 1)

0.353

 AST (≤ 50 U/l = 1)

0.649

 ALT (≤ 50 U/l = 1)

0.315

 GGT (≤ 400 U/l = 1)

0.263

 Bilirubin (≤ 1 mg/dl = 1)

0.921

 Alkaline phosphatase (≤ 250 U/l = 1)

0.439

 Platelet count (≤ 300/nl = 1)

0.462

 INR (≤ 1 = 1)

0.364

 Hemoglobin (≤ 12 g/dl = 1)

0.819

 CRP, mg/l (≤ 10 mg/l = 1)

0.694

 CA 19–9, U/ml (≤ 250 U/ml = 1)

0.673