Table 2 Univariate and multivariate analyses of characteristics associated with postoperative complications

Age ≥ 70

1.581

1.232–2.029

< 0.001

1.578

1.219–2.044

0.001

 Male

0.765

0.597–0.979

0.033

0.710

0.551–0.916

0.008

 Female

BMI (kg/m²)

0.988

0.956–1.020

0.449

 Previous abdominal surgery

0.996

0.722–1.374

0.982

 Diabetes mellitus

1.156

0.787–1.700

0.460

 Hypertension

1.128

0.891–1.428

0.317

 Serum albumin < 35 g/L

1.660

1.162–2.372

0.005

1.544

1.068–2.232

0.021

 CRP ≥ 10 g/L

1.315

0.892–1.938

0.167

ASA ≥ 3

1.047

0.834–1.315

0.693

 Laparoscopic

0.684

0.394–1.188

0.178

 Open

Type of resection

0.067

0.025

 Total gastrectomy

Reference

Reference

 Distal gastrectomy

1.183

0.932–1.503

0.167

1.242

0.972–1.588

0.083

 Proximal gastrectomy

1.503

1.047–2.157

0.027

1.613

1.117–2.329

0.011

Operation time

1.002

1.001–1.004

0.009

1.003

1.001–1.005

0.002

Blood loss

1.000

1.000–1.001

0.094

Tumor site

0.780

 Cardia/fundus

Reference

 Body

1.054

0.811–1.370

0.693

 Pylorus/antrum

0.947

0.716–1.252

0.701

Tumor invasion (T3–4)

1.216

0.968–1.527

0.093

RLNs

0.991

0.979–1.004

0.165

Lymph node metastasis

1.044

0.832–1.310

0.707

LNR > 0.05

1.213

0.969–1.517

0.091

LODDS > − 1.1

1.219

0.975–1.525

0.083

pTNM stage (≥ III)

1.036

0.826–1.300

0.757

Lauren subtype

0.952

 Intestinal

Reference

 Diffuse

0.866

0.427–1.754

0.689

 Mixed

0.904

0.442–1.848

0.782

 Unknown

0.925

0.452–1.894

0.832