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Table 2 Univariate and multivariate analysis for the prognostic factors of BCSS

From: The effect of postmastectomy radiotherapy in node-positive triple-negative breast cancer

Variables

Univariate Cox

Multivariate Cox

OR1

95%CI2

P value

OR

95%CI

P value

Age (years)

 < 50

1

  

1

  

 ≥ 50

1.200

1.082–1.332

0.001

1.121

1.009–1.245

0.033

Ethnicity

  

0.001

  

0.010

 White

1

  

1

  

 Black

1.177

1.046–1.324

0.007

1.142

1.015–1.285

0.028

 Other

0.808

0.660–0.990

0.039

0.834

0.681–1.022

0.081

Grade

  

0.085

   

 Well-differentiated

1

     

 Moderately differentiated

1.101

0.543–2.233

0.789

   

 Poorly/undifferentiated

1.295

0.646–2.594

0.467

   

Histology

  

0.073

   

 IDC3

1

     

 ILC4

1.147

0.789–1.668

0.472

   

 Other

1.230

1.023–1.480

0.028

   

T5 stage

  

< 0.001

  

< 0.001

 T1

1

  

1

  

 T2

1.516

1.289–1.784

< 0.001

1.423

1.209–1.676

< 0.001

 T3

2.831

2.379–3.370

< 0.001

2.201

1.791–2.705

< 0.001

 T4

4.027

3.370–4.812

< 0.001

2.900

2.363–3.559

< 0.001

N6 stage

  

< 0.001

  

< 0.001

 N1

1

  

1

  

 N2

1.953

1.731–2.204

< 0.001

1.753

1.553–1.980

< 0.001

 N3

3.206

2.828–3.634

< 0.001

2.677

2.358–3.039

< 0.001

Staging subgroup

  

< 0.001

  

< 0.001

 T1–2N1

1

  

1

  

 T3–4N1

2.394

2.066–2.773

< 0.001

1.249

1.018–1.533

0.033

 T1-4N2

2.618

2.285–3.000

< 0.001

1.942

1.666–2.263

< 0.001

 T1-4N3

4.324

3.758–4.975

< 0.001

3.004

2.548–3.542

< 0.001

PMRT

 No PMRT

1

  

1

  

 PMRT

0.931

0.841–1.029

0.161

0.685

0.617–0.760

< 0.001

  1. 1. OR odds ratio; 2. CI confidence interval; 3. IDC invasive ductal carcinoma; 4. ILC invasive lobular carcinoma; 5. T tumor; 6. N nodal
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