Table 2 Multivariate analysis for factors associated with disease-specific survival from the SEER database.

From: A simplified breast cancer prognostic score: comparison with the AJCC clinical prognostic staging system

Clinicopathologic factors

HR (95% CI)

P value

Points assigned

Age

  <50 years

Reference

 

0

  ≥50 years

1.421 (1.326–1.521)

<0.0001

1

Race

  Caucasian

Reference

 

0

  African American

1.272 (1.185–1.365)

<0.0001

1

  Other

0.819 (0.738–0.909)

<0.0001

0

  Unknown

0.262 (0.118–0.583)

0.001

0

Histologic grade

  I

Reference

 

0

  II

1.628 (1.440–1.840)

<0.0001

1

  III

2.516 (2.222–2.848)

<0.0001

1

Pathologic T stage

  T1

Reference

 

0

  T2

2.112 (1.934–2.308)

<0.0001

1

  T3

3.343 (3.018–3.703)

<0.0001

1

  T4

4.465 (4.043–4.930)

<0.0001

2

Pathologic N stage

  N0

Reference

 

0

  N1

1.376 (1.278–1.482)

<0.0001

1

  N2

1.609 (1.467–1.764)

<0.0001

1

  N3

1.884 (1.720–2.065)

<0.0001

1

M status

  M0

Reference

 

0

  M1

4. 842 (4.524–5.182)

<0.0001

2

ER status

  Positive

Reference

 

0

  Negative

1.468 (1.353–1.593)

<0.0001

1

PR status

  Positive

Reference

 

0

  Negative

1.542 (1.427–1.666)

<0.0001

1

HER2 status

  Positive

Reference

 

0

  Negative

1.698 (1.583–1.822)

<0.0001

1

  1. HR hazard ratio, CI confidence interval.