Table 4 Cox proportional hazards regression analysis of overall survival, recurrence-free survival, and cancer-specific survival

 Age (≧80 vs <80)

2.564

1.465–4.489

0.001

1.736

0.875–3.442

0.115

 Sex male (male vs female)

0.517

0.266–1.005

0.052

0.524

0.262–1.048

0.067

 PLND (yes vs no)

0.451

0.231–0.882

0.020

0.501

0.207–1.214

0.126

 ASA score (>2 vs ≤2)

1.889

1.080–3.302

0.026

2.076

1.008–4.276

0.048

 CCI (continuous variable)

1.523

1.108–2.093

0.009

1.113

0.736–1.682

0.613

 pT(≧ pT3 vs

6.417

3.473–11.855

<0.001

4.553

2.359–8.788

<0.001

 pN(+ vs −)

4.605

2.668–7.950

<0.001

4.411

2.322–8.378

<0.001

 Positive surgical margin (+ vs −)

1.083

0.337–3.478

0.893

0.520

0.148–1.823

0.307

 Age (≧80 vs <80)

1.665

0.921–3.011

0.092

1.096

0.528–2.271

0.806

 Sex male (male vs female)

0.724

0.355–1.477

0.374

1.275

0.631–2.656

0.515

 PLND (yes vs no)

0.584

0.286–1.195

0.141

0.572

0.232–1.413

0.226

 ASA score (>2 vs ≤2)

1.354

0.798–2.299

0.262

0.931

0.475–1.826

0.836

 CCI (continuous variable)

1.726

1.264–2.358

0.001

1.812

1.218–2.695

0.003

 pT (≧ pT3 vs

4.644

2.665–8.094

<0.001

3.206

1.738–5.913

<0.001

 pN (+ vs −)

4.037

2.359–6.908

<0.001

3.615

1.934–6.755

<0.001

 Positive surgical margin (+ vs −)

0.670

0.163–2.752

0.579

0.292

0.066–1.288

0.104

 Age (≧80 vs <80)

2.234

1.208–4.132

0.010

1.455

0.676–3.132

0.337

 Sex male (male vs female)

0.554

0.267–1.147

0.112

1.690

0.795–3.593

0.173

 PLND (yes vs no)

0.492

0.235–1.027

0.059

0.557

0.211–1.476

0.239

 ASA score (>2 vs ≤2)

1.656

0.920–2.983

0.093

1.598

0.747–3.417

0.227

 CCI (continuous variable)

1.607

1.143–2.261

0.006

1.328

0.855–2.064

0.206

 pT (≧ pT3 vs

7.471

3.781–14.760

<0.001

5.369

2.598–11.097

<0.001

 pN (+ vs −)

4.364

2.423–7.857

<0.001

3.779

1.910–7.476

<0.001

 Positive surgical margin (+ vs −)

0.814

0.197–3.363

0.776

0.361

0.080–1.636

0.186