Summary of Selected Data

Key Data from 1996-2016 at THE 6 active BCSC sites

  Number of Records
Women 2,375,050
Women with Breast Cancer 156,757
Breast Imaging Exams 11,967,811
Radiologists 1,891
Facilities where Mammograms Were Read 291

Summary of Selected Variables

FROM data collected at breast imaging exam

 

Age at Exam Number of Exams Percent
18-24 25,307 0.2%
25-29 46,334 0.4%
30-34 119,654 1.0%
35-39 417,982 3.5%
40-44 1,519,102 12.7%
45-49 1,723,677 14.4%
50-54 1,844,226 15.4%
55-59 1,661,660 13.9%
60-64 1,406,026 11.7%
65-69 1,173.311 9.8%
70-74 887,468 7.4%
75-79 624,329 5.2%
80-84 350,586 2.9%
85-89 136,912 2.9%
90+ 30,962 0.3%
Total 11,967,536 100%

Note: Age data is missing for 275 records. These records have been excluded from the table. 

 

Race/ethnicity Number of Exams Percent
White 8,136,585 73.1%
Black, non-hispanic 1,221,359 11.0%
Asian 998,702 9.0%
Native Hawaiian or Pacific Islander 6,920 0.1%
American Indian or Alaska Native 35,220 0.3%
Other 82,634 0.7%
Mixed (2+ races reported) 101,643 0.9%
Hispanic 544,468 4.9%
Total 11,127,531 100%

Note: All categories are non-Hispanic except the Hispanic category. 

Note: Race data is missing for 840,280 records (7.0%). 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 3,435,464 32.3%
Yes 7,215,015 67.7%
Total 10,650,479 100%

Note: Menopausal status is missing for 748,129 records (6.3%). 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) 108,878 1.7%
18.5 - 24.9 (Normal) 2,682,341 40.7%
25.0 - 29.9 (Overweight) 1,957,317 29.7%
30.0 - 34.9 (Obese I) 1,057,853 16.1%
35.0 - 39.9 (Obese II) 464,665 7.1%
40 or greater (Obese III) 314,138 4.8%
Total 6,585,192 100%

Note: BMI is missing for 5,382,619 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 836,524 8.1%
2 (b): Scattered fibroglandular tissue 4,470,054 43.1%
3 (c): Heterogeneously dense 4,192,867 40.4%
4 (d): Extremely dense 877,865 8.5%
Total 10,377,310 100%

Note: Breast density is missing for 1,590,501 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 9,226,042 83.9%
Yes 1,765,658 16.1%
Total 10,991,700 100%

Note: Family History is missing for 976,111 records (8.2%). 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/."