Table 1.
Characteristics of Women Who Received Breast Cancer Screening in the Breast Cancer Surveillance Consortium ( n = 348,955)
| Characteristic | N | % |
|---|---|---|
| Age at first examination (years) | ||
| 35–39 | 16,141 | 4.6 |
| 40–49 | 129,122 | 37.0 |
| 50–59 | 123,249 | 35.3 |
| 60–69 | 80,443 | 23.1 |
| Race/ethnicity | ||
| Non-Hispanic White | 222,951 | 69.9 |
| Non-Hispanic Black | 23,155 | 7.3 |
| Hispanic | 20,453 | 6.4 |
| Other | 52,368 | 16.4 |
| Missing | 30,028 | |
| Highest level of education | ||
| HS grad/GED or less | 62,092 | 21.2 |
| Some college/technical | 74,868 | 25.5 |
| College grad or higher | 156,586 | 53.3 |
| Missing | 55,409 | |
| First-degree family history of breast cancer | ||
| No | 305,503 | 87.6 |
| Yes | 43,452 | 12.4 |
| Had prior biopsy | 16,737 | 5.2 |
| Highest severity of prior biopsy | ||
| Non-proliferative disease | 11,157 | 66.7 |
| Proliferative disease without atypia | 4684 | 28.0 |
| Proliferative disease with atypia | 728 | 4.4 |
| Lobular carcinoma in situ | 168 | 1.0 |
| BI-RADS density | ||
| Almost entirely fat | 32,166 | 10.3 |
| Scattered fibroglandular tissue | 121,751 | 39.1 |
| Heterogeneously dense | 124,730 | 40.0 |
| Extremely dense | 32,909 | 10.6 |
| Missing | 37,399 | |
| Gail lifetime risk | ||
| High ≥ 20% | 4705 | 1.4 |
| Average (< 20%) | 343,951 | 98.6 |
| Missing | 299 | |
BI-RADS: American College of Radiology Breast Imaging Reporting and Data System