Table 4: Women's characteristics and biopsy rates for each surveillance window.


Surveillance windows
24 months42 months60 months78 months

Numerator ( ): number women who have an event
103764634
Denominator ( ): number of women in
surveillance window
1219895619363
Overall rate (%)8.4%8.5%7.4%9.4%

CharacteristicRate %Rate %Rate %Rate %

Age at diagnosis (years)
 65–69 10.2 9.6 9.3 10.3
 70–74 10.0 12.0 5.7 13.8
 75–79 7.0 4.8 7.7 6.0
 80+ 5.0 5.2 6.7 2.0
Stage at diagnosis
 I 8.7 8.9 7.4 8.7
 DCIS 7.3 5.8 8.9 11.8
 IIA 6.2 7.4 4.6 8.8
 IIB 15.4 20.0 8.3 7.1
 III 10.8 4.4 20.0 16.7
Primary therapy
 Mastectomy 9.6 9.0 6.7 8.4
 Breast conserving surgery with radiation 8.0 10.9 13.2 14.0
 Breast conserving surgery 4.3 4.8 8.3 18.5
 Unknown/other 3.6 4.2 3.3 4.8
Family history of breast cancer
 No 8.3 9.3 7.7 7.6
 Yes 8.6 6.4 6.8 14.1
 Unknown 14.3 0.0 0.0 NA
Comorbidities
 0 7.7 7.7 7.0 7.2
 1 9.4 9.8 7.6 15.9
 2+ 10.6 11.1 11.1 18.2
Education
High school 6.6 8.1 5.3 14.7
 High school/GED 8.8 8.2 7.0 7.4
 Some college 8.8 7.8 10.7 12.7
 College+ 7.7 7.0 6.8 9.5
 Unknown 10.2 15.7 4.9 3.2