Table 6 Multivariate analysis using Cox regression hazard model for DFS and OS

Disease-free survival

 Age (years) (≥ 52 vs < 52)

0.733

0.309

0.018

2.081

1.137

3.810

 pT stage (3 & 4 vs 1 & 2)

0.677

0.317

0.032

1.968

1.058

3.660

 Ki-67% (≥ 45 vs < 45)

1.127

0.321

< 0.001

3.085

1.645

5.788

 Molecular subtype (TN vs non-TN)

1.165

0.350

0.001

3.205

1.615

6.362

 LVI (present vs absent)

0.814

0.311

0.009

2.257

1.228

4.150

Overall survival

 pT stage (3 & 4 vs 1 & 2)

0.735

0.300

0.014

2.086

1.159

3.755

 Ki-67% (≥ 45 vs < 45)

1.038

0.313

0.001

2.825

1.529

5.219

 Molecular subtype (TN vs non-TN)

0.963

0.332

0.004

2.619

1.366

5.022

 Nodal status (positive vs negative)

0.637

0.300

0.033

1.891

1.051

3.403