Table 2 Cox proportional hazards regression model multivariate analysis of the overall survival and breast cancer-specific survival in PR-positive cohort (forward: LR)

 ≤ 40

Reference

Reference

 41–55

1.143 (0.729–1.791)

0.56

1.245 (0.761–2.035)

0.383

 56–70

1.633 (1.056–2.525)

0.027

1.245 (0.768–2.017)

0.374

 71–85

3.695 (2.391–5.709)

< 0.001

1.693 (1.032–2.776)

0.037

 > 85

7.501 (4.678–12.029)

< 0.001

2.167 (1.123–4.182)

0.021

 White

Reference

Reference

 Black

1.290 (1.069–1.557)

0.008

1.453 (1.129–1.869)

0.004

 Other

0.874 (0.662–1.156)

0.346

0.959 (0.628–1.466)

0.848

 Unknown

0.862 (0.348–2.138)

0.749

0.000 (0.000–8.644E+62)

0.905

 Married

Reference

Reference

 Not married

1.589 (1.397–1.808)

< 0.001

1.508 (1.243–1.829)

< 0.001

 Unknown

1.318 (0.957–1.814)

0.08

1.156 (0.690–1.938)

0.582

 I

Reference

Reference

 II

1.250 (0.996–1.568)

0.054

2.136 (1.297–3.519)

0.003

 III/IV

1.470 (1.162–1.858)

0.001

2.775 (1.675–4.596)

< 0.001

 Unknown

1.175 (0.875–1.578)

0.283

2.493 (1.412–4.401)

0.002

 T1

Reference

Reference

 T2

1.565 (1.450–1.911)

< 0.001

1.953 (1.567–2.435)

< 0.001

 T3

1.858 (1.395–2.475)

< 0.001

1.746 (1.161–2.626)

0.007

 T4

1.890 (1.490–2.397)

< 0.001

2.636 (1.863–3.728)

< 0.001

 TX

0.873 (0.588–1.296)

0.501

0.981 (0.549–1.753)

0.948

 N0

Reference

Reference

 N1

1.655 (1.426–1.922)

< 0.001

2.317 (1.829–2.935)

< 0.001

 N2

1.931 (1.558–2.395)

< 0.001

2.713 (2.002–3.677)

< 0.001

 N3

2.362 (1.879–2.968)

< 0.001

4.075 (3.022–5.495)

< 0.001

 NX

2.348 (1.741–3.168)

< 0.001

2.194 (1.355–3.553)

0.001

 M0

Reference

Reference

 M1

2.952 (2.348–3.713)

< 0.001

5.412 (4.075–7.189)

< 0.001

 Done

Reference

Reference

 Not

2.350 (1.766–3.127)

< 0.001

2.623 (1.830–3.758)

< 0.001

 Unknown

1.580 (0.690–3.617)

0.279

1.692 (0.646–4.428)

0.284

 Yes

Reference

–

–

 No/unknown

1.261 (1.088–1.461)

0.002

–

–