Key Data from 1996-2023 ACROSS 8 BCSC sites
| Number of Records | |
| Women | 2,945,425 |
| Women with Breast Cancer | 218,486 |
| Breast Imaging Exams | 15,690,877 |
| Radiologists | 2,263 |
| Facilities where Mammograms Were Read | 321 |
Summary of Selected Variables
FROM data collected at breast imaging exam
| Age at Exam | Number of Exams | Percent |
| 18-24 |
36,139
|
0.2% |
| 25-29 |
63,853
|
0.4% |
| 30-34 |
157,679
|
1.0% |
| 35-39 |
490,785
|
3.1% |
| 40-44 |
1,889,102
|
12.0% |
| 45-49 |
2,165,925
|
13.8% |
| 50-54 |
2,365,679
|
15.1% |
| 55-59 |
2,196,309
|
14.0% |
| 60-64 |
1,936,393
|
12.3% |
| 65-69 |
1,661,398
|
10.6% |
| 70-74 |
1,264,028
|
8.1% |
| 75-79 |
821,222
|
5.2% |
| 80-84 |
436,123
|
2.8% |
| 85-89 |
166,857
|
1.1% |
| 90+ |
38,362
|
0.3% |
| Total |
15,689,854
|
100% |
Note: Age data is missing for 1,023 records. These records have been excluded from the table.
| Race/ethnicity | Number of Exams | Percent |
| American Indian or Alaska Native | 52,324 | 0.4% |
| Asian | 1,353,831 | 9.1% |
| Black | 1,558,165 | 10.5% |
| Hispanic | 807,658 | 5.4% |
| Native Hawaiian or Pacific Islander | 25,837 | 0.2% |
| White | 10,792,541 | 72.5% |
| Multiple (2+ races) | 115,623 | 0.8% |
| Other | 148,940 | 1.0% |
| Total | 14,854,919 | 100% |
Note: All categories are non-Hispanic except the Hispanic category.
Note: Race data is missing for 835,958 records (5.3%). 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 | 4,847,002 | 36.3% |
| Yes | 8,511,988 | 63.7% |
| Total | 13,358,990 | 100% |
Note: Records with menopausal status coded as surgical menopause or periods stopped for other reason (1,232,455, 7.9%), or missing menopausal status (1,099,432, 7.0%) were excluded from this table. Missingness is primarily due to women choosing not to self-report and certain facilities not collecting menopausal status information.
| BMI (kg/m2) | Number of Exams | Percent |
| Underweight (18.5 or less) | 151,277 | 1.6% |
| Healthy weight (18.5 - 24.9) | 3,665,347 | 39.1% |
| Overweight (25.0 - 29.9) | 2,776,214 | 29.7% |
| Class 1 Obesity (30.0 - 34.9) | 1,556,282 | 16.6% |
| Class 2 Obesity (35.0 - 39.9) | 708,834 | 7.6% |
| Class 3 Obesity (40 or greater) | 505,694 | 5.4% |
| Total | 9,363,648 | 100% |
Note: BMI is missing for 6,327,229 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 | 1,149,565 | 8.1% |
| 2 (b): Scattered fibroglandular tissue | 6,056,667 | 43.0% |
| 3 (c): Heterogeneously dense | 5,701,591 | 40.5% |
| 4 (d): Extremely dense | 1,176,790 | 8.4% |
| Total | 14,084,613 | 100% |
Note: Breast density is missing for 1,606,264 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 | 11,650,401 | 82.6% |
| Yes | 2,456,071 | 17.4% |
| Total | 14,106,472 | 100% |
Note: Family History is missing for 1,584,405 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/."