Characteristic

HR

P Value

Age

Continuous, per year

0.977

<0.0001

Family History

Yes vs No

1.28

0.03

Presentation

Clinical vs Radiologic

1.40

0.03

Nuclear Grade

High vs Non-high

1.03

0.8

Necrosis

Present vs Absent

1.43

0.01

No. of Excisions

≥3 vs ≤2

1.56

0.03

Margin Status

Negative vs Positive/Close

0.72

0.02

Radiation

Yes vs No

0.40

<0.0001

Endocrine Treatment

Yes vs No

0.52

0.0002

Time Period

1999-2010 vs 1978-1998

0.74

0.02