Sensitivity, Specificity, and False negative rate for 1,682,504 Screening Mammography Examinations from 2007 - 2013
Based on BCSC data through 2013
| Number of Screening Exams | |
| Sensitivity* | 86.9% |
| True positives† | 8,529 |
| Cancers‡ | 9,812 |
| Specificity§ | 88.9% |
| True negatives|| | 1,486,553 |
| Non-Cancers# | 1,672,692 |
| False negative rate (per 1000)†† | 0.8 |
| False negatives‡‡ | 1,283 |
| All examinations | 1,682,504 |
Notes:
Numbers are frequencies unless otherwise indicated.
Screening Mammography Examinations: mammography examinations indicated by the radiologist to be for screening, with bilateral routine views done and no other mammogram within the last 9 months, among women without breast implants.
* Sensitivity = the percentage of cancers that had an abnormal initial interpretation (BI-RADS category 0, 4, 5; Note: 3 with a recommendation for immediate follow-up was recoded as 0).
† True Positive = the number of cancers that had an abnormal initial interpretation.
‡ Cancers = the number of examinations with a tissue diagnosis of cancer within 1 year following the examination.
§ Specificity = the percentage of non-cancers that had a negative initial interpretation (BI-RADS category 1, 2, or 3 with no recommendation for immediate follow-up).
|| True Negative = the number of non-cancers that had a negative initial interpretation.
# Non-cancers = the number of examinations without a tissue diagnosis of cancer within 1 year following the examination.
†† False negative rate = the rate (per 1000 exams) of false-negative exams.
‡‡ False negatives = the number of cancers that had a negative initial interpretation.
Table numbers last updated March 23, 2017 .
The following must be cited when reproducing this data:
"The Breast Cancer Surveillance Consortium and its data collection and sharing activities are funded by the National Cancer Institute (P01CA154292). Downloaded xx/xx/xxxx from the Breast Cancer Surveillance Consortium Web site - http://www.bcsc-research.org/."