Table 2: Women's characteristic and mammographic rates for each surveillance window.

Surveillance windows
24 months42 months60 months78 months

Numerator ( ): number women who have an event
1088774518296
Denominator ( ): number of women in surveillance window
1219895619363
Overall rate (%)89.3%86.5%83.7%81.5%

CharacteristicRate %Rate %Rate %Rate %

Age at diagnosis (years)
 65–69 88.0 86.5 87.1 86.0
 70–74 92.9 91.2 86.5 85.4
 75–79 89.2 87.2 86.2 81.0
 80+ 85.4 78.0 69.2 63.3
Stage at diagnosis
 I 91.3 88.7 86.2 84.5
 DCIS 91.0 85.6 85.0 82.4
 IIA 85.7 85.9 79.8 75.0
 IIB 78.5 75.6 75.0 78.6
 III 81.1 69.6 40.0 50.0
Primary therapy
 Mastectomy 90.6 85.9 82.6 79.3
 Breast conserving surgery with radiation 97.3 97.7 97.8 95.4
 Breast conserving surgery 88.0 88.1 79.2 88.9
 Unknown/other 59.0 69.0 73.3 76.2
Family history of breast cancer
 No 88.7 86.2 82.6 80.3
 Yes 90.8 87.2 86.5 84.9
 Unknown 85.7 100.0 100.0 NA
Comorbidities
 0 87.8 87.9 84.8 81.3
 1 91.6 84.5 81.5 79.4
 2+ 93.2 80.3 79.6 90.9
Education
High school 87.6 83.9 73.7 85.3
 High school/GED 88.9 87.8 88.2 87.4
 Some college 90.1 87.3 82.1 77.2
 College+ 89.4 88.6 87.1 83.3
 Unknown 89.8 77.1 72.1 58.1