Table 4 Univariate and multivariate analyses for overall survival

Age ≥ 70 years

0.864

0.506–1.478

0.594

Male

1.328

0.746–2.363

0.334

ASA score 2 or 3

1.497

0.825–2.717

0.181

PNI < 45

1.167

0.639–2.130

0.616

mGPS 1 or 2

1.304

0.702–2.420

0.399

BMI < 22 kg/m²

0.612

0.364–1.030

0.062

Bilobe tumour

2.039

1.176–3.535

0.010

2.367

1.357–4.128

0.002

Primary tumour rectum

0.798

0.452–1.406

0.433

Tumour size ≥ 30 mm

1.989

1.177–3.361

0.009

Number of tumours ≥ 4

1.789

1.063–3.013

0.026

Metachronous

1.003

0.597–1.684

0.991

Other organ metastasis at Hx

2.714

1.518–4.855

< 0.001

2.891

1.557–5.371

0.001

Preoperative chemotherapy

1.231

0.716–2.118

0.452

Postoperative chemotherapy

0.698

0.408–1.194

0.698

CEA ≥ 10 ng/dl

2.356

1.402–3.958

0.001

1.838

1.078–3.133

0.025

CA19-9 ≥ 20 mU/l

1.578

0.928–2.684

0.089

Major resection

1.306

0.746–2.286

0.348

Synchronous resection for primary tumour

0.981

0.354–2.719

0.970

Operation time ≥ 480 min

1.174

10.683–2.018

0.562

Operative blood loss > 600 ml

1.350

0.683–2.018

0.254

Po complication ≥ C-D grade 3

3.568

1.819–7.000

H group

2.842

1.577–5.123

< 0.001

15.280

1.478–102.784

< 0.001

Low PMI group

0.850

0.497–1.453

0.552