Table 4 Multivariate analysis by Cox proportional hazard model

Age

0.891

0.887

0.280

0.427

0.128

0.111

Gender

0.181

0.186

0.127

0.231

0.922

0.712

TNM stage

< 0.001

< 0.001

< 0.001

< 0.001

< 0.001

< 0.001

Tumor location

0.641

0.476

0.945

0.775

0.863

0.502

Tumor length

0.110

0.070

0.275

0.031

0.620

0.414

BMI

0.574

0.378

0.442

0.399

0.897

0.688

Postoperative complication

< 0.001

< 0.001

0.505

0.843

0.854

< 0.001

Surgical approach

0.415

0.407

–

–

–

–