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Table 4 Multivariate survival analysis

From: Level IV neck dissection in cN0 HPV-negative oropharyngeal squamous cell carcinoma: a retrospective cohort study

DFS

B

P

HR

95% CI HR

    

Inf

Sup

SND (I-IV)

0.019

0.949

1.019

0.564

1.841

N stage

 

0.185

   

  N1

0.200

0.583

1.221

0.598

2.495

  N2

0.302

0.510

1.353

0.551

3.332

  N3

1.357

0.030

3.883

1.140

13.224

Chemoradiotherapy

0.727

0.041

2.068

1.029

4.155

OS

B

P

HR

95% CI HR

    

Inf

Sup

SND (I-IV)

-0.131

0.731

0.878

0.418

1.845

T stage

 

0.115

   

  T2

0.061

0.940

1.063

0.214

5.283

  T3

0.957

0.223

2.605

0.559

12.142

  T4

0.174

0.843

1.190

0.214

6.622

Radiotherapy

-0.785

0.055

0.456

0.205

1.015

Chemoradiotherapy

0.880

0.042

2.411

1.031

5.636

DSS

B

P

HR

95% CI HR

    

Inf

Sup

SND (I-IV)

0.353

0.354

1.424

0.674

3.007

T stage

 

0.278

   

  T1

0.172

0.833

1.187

0.242

5.831

  T2

0.847

0.280

2.332

0.502

10.823

  T3

0.075

0.930

1.078

0.200

5.819

Chemoradiotherapy

0.700

0.079

2.013

0.922

4.395

  1. Cox proportional hazard model was used for multivariate survival analysis
  2. Abbreviations: DFS Disease-free survival, SND Selective neck dissection, OS Overall survival, DSS Disease-specific survival, B β coefficient, P p value, HR Hazard ratio, 95% CI 95% Confidence Interval