Table 2 Results of disease-free survival analysis by Cox proportional hazards model for the ER+/HER2− tumors, n = 939

 35–50 vs < 35

0.386

0.196

0.763

0.006

0.342

0.170

0.687

0.003

 51–65 vs < 35

0.477

0.238

0.959

0.038

0.454

0.220

0.936

0.032

 > 65 vs < 35

0.378

0.140

1.021

0.055

0.274

0.080

0.938

0.039

 T2 vs T1

2.162

1.348

3.468

0.001

1.731

1.054

2.844

0.030

 T3 vs T1

4.654

1.948

11.118

0.001

3.219

1.288

8.045

0.012

 N1 vs N0

1.826

1.173

2.844

0.008

1.797

1.007

3.207

0.047

 positive vs negative

1.831

1.099

3.048

0.020

1.332

0.776

2.284

0.298

 III vs I/II

2.890

1.808

4.619

<0.001

1.785

1.059

3.010

0.030

 10–30 vs ≤10

2.859

1.336

6.116

0.007

2.835

1.312

6.126

0.008

 ≥ 30 vs ≤10

5.394

2.732

10.651

<0.001

4.239

2.057

8.735

<0.001

 < 20 vs ≥20

1.273

0.778

2.083

0.336

0.799

0.472

1.355

0.405

 Mastectomy vs BCS

1.658

1.065

2.581

0.025

0.941

0.472

1.874

0.862

 No vs Yes

0.731

0.376

1.419

0.354

1.430

0.620

3.298

0.402

 No vs Yes

1.291

0.803

2.074

0.292

2.157

0.950

4.894

0.066