Key Data from 1996-2019 at THE 6 active BCSC sites
| Number of Records | |
| Women | 2,543,460 |
| Women with Breast Cancer | 182,395 |
| Breast Imaging Exams | 13,292,173 |
| Radiologists | 2,058 |
| Facilities where Mammograms Were Read | 304 |
Summary of Selected Variables
FROM data collected at breast imaging exam
| Age at Exam | Number of Exams | Percent |
| 18-24 | 28,099 | 0.2% |
| 25-29 | 51,187 | 0.4% |
| 30-34 | 130,046 | 1.0% |
| 35-39 | 436,949 | 3.3% |
| 40-44 | 1,623,331 | 12.3% |
| 45-49 | 1,865,928 | 14.1% |
| 50-54 | 2,018,376 | 15.3% |
| 55-59 | 1,852,587 | 14.0% |
| 60-64 | 1,596,545 | 12.1% |
| 65-69 | 1,346,150 | 10.2% |
| 70-74 | 1,018,172 | 7.7% |
| 75-79 | 690,484 | 5.2% |
| 80-84 | 379,936 | 2.9% |
| 85-89 | 147,612 | 1.1% |
| 90+ | 33,755 | 0.3% |
| Total | 13,219,157 | 100% |
Note: Age data is missing for 73,016 records. These records have been excluded from the table.
| Race/ethnicity | Number of Exams | Percent |
| White | 9,100,335 | 73.2% |
| Black | 1,354,433 | 10.9% |
| Asian | 1,105,608 | 8.9% |
| Native Hawaiian or Pacific Islander | 8,360 | 0.1% |
| American Indian or Alaska Native | 39,788 | 0.3% |
| Other | 83,772 | 0.7% |
| Mixed (2+ races reported) | 111,497 | 0.9% |
| Hispanic | 629,205 | 5.1% |
| Total | 12,432,998 | 100% |
Note: All categories are non-Hispanic except the Hispanic category.
Note: Race data is missing for 859,175 records (6.5%). Missingness is due primarily to women choosing not to self-report race and certain facilities not collecting race information. Missing values have been excluded from the table.
| Postmenopausal at Exam | Number of Exams | Percent |
| No | 4,095,823 | 36.2% |
| Yes | 7,215,477 | 63.8% |
| Total | 11,311,300 | 100% |
Note: Menopausal status is missing for 1,055,959 records (7.9%). Missingness is due primarily to women choosing not to self-report and certain facilities not collecting menopausal status information. Missing values have been excluded from the table.
| BMI (kg/m2) | Number of Exams | Percent |
| 18.5 or less (Underweight) | 120,333 | 1.6% |
| 18.5 - 24.9 (Normal) | 2,971,743 | 40.3% |
| 25.0 - 29.9 (Overweight) | 2,187,995 | 29.7% |
| 30.0 - 34.9 (Obese I) | 1,194,013 | 16.2% |
| 35.0 - 39.9 (Obese II) | 530,152 | 7.2% |
| 40 or greater (Obese III) | 363,712 | 4.9% |
| Total | 7,367,948 | 100% |
Note: BMI is missing for 5,924,225 records. Missingness is due primarily to women choosing not to self-report and certain facilities not collecting BMI information. Missing values have been excluded from the table.
| Breast Density at Exam, BI-RADS | Number of Exams | Percent |
| 1 (a): Almost entirely fat | 962,213 | 8.3% |
| 2 (b): Scattered fibroglandular tissue | 5,016,975 | 43.2% |
| 3 (c): Heterogeneously dense | 4,672,047 | 40.2% |
| 4 (d): Extremely dense | 976,553 | 8.4% |
| Total | 11,627,788 | 100% |
Note: Breast density is missing for 1,664,385 records. Missingness is due primarily to certain facilities not collecting density information in some years. Missing values have been excluded from the table.
| First Degree Family History of Breast Cancer at Exam | Number of Exams | Percent |
| No | 9,910,427 | 82.9% |
| Yes | 2,045,156 | 17.1% |
| Total | 11,955,583 | 100% |
Note: Family History is missing for 1,336,590 records (10.1%). Missingness is due primarily to women choosing not to self-report and certain facilities not collecting family history information. Missing values have been excluded from the table.
The following must be cited when reproducing this data:
"The Breast Cancer Surveillance Consortium and its data collection and sharing activities are funded by grants from the National Cancer Institute (P01CA154292, U54CA163303), Patient-Centered Outcomes Research Institute (PCS-1504-30370), and Agency for Health Research and Quality (R01 HS018366-01A1). Downloaded xx/xx/xxxx from the Breast Cancer Surveillance Consortium Web site - http://www.bcsc-research.org/. More information regarding the BCSC is available at: http://bcsc-research.org/."