Table 3 Odds ratios from univariate and multivariate analysis of postoperative complications of Clavien-Dindo grade 3 or worse

Age ≥ 70 years

1.125

0.334–3.787

1.000

Male

1.414

0.359–5.669

0.849

ASA score 2 or 3

2.055

0.425–9.942

0.362

PNI < 45

1.040

0.261–4.143

0.956

mGPS 1 or 2

2.361

0.641–8.694

0.186

BMI < 22 kg/m²

0.472

0.140–1.590

0.218

Bilobed tumour

1.552

0.439–5.480

0.492

Tumour size ≥ 30 mm

3.717

0.951–14.53

0.046

2.633

0.425–7.359

0.203

Number of tumours ≥ 4

0.327

0.084–1.277

0.094

Metachronous occurrence

0.757

0.226–2.541

0.652

CEA ≥ 10 ng/dl

1.512

0.456–5.013

0.497

CA19-9 ≥ 20 mU/l

1.887

0.535–6.658

0.318

Major resection

2.697

0.797–9.000

0.101

Synchronous resection for primary tumour

1.008

0.123–9.460

0.945

Operation time ≥ 480 min

3.407

1.002–11.583

0.040

1.768

0.592–11.703

0.433

Operative blood loss > 600 ml

8.205

1.708–39.420

0.003

9.564

1.913–47.811

0.006

H group

10.377

1.292–83.337

0.008

12.326

1.478–102.784

0.020

Low PMI group

0.504

0.129–1.974

0.318