BENCHMARKS FOR SENSITIVITY, SPECIFICITY, & FALSE NEGATIVE RATE FOR SCREENING MAMMOGRAPHY EXAMS
BASED ON BCSC DATA from 2007-2013*
Sensitivity
| Number of Screening Exams | |
|---|---|
| Sensitivity** | 86.9 |
| Readers with 30+ cancers | 104 |
| True Positives† | 6,367 |
| Cancers‡ | 7,323 |
| Sensitivity(Median-50th percentile) | 88 |
| Sensitivity(25th, 75th percentiles) | 84.8, 90.7 |
| Sensitivity(10th, 90th percentiles) | 80.7, 93.8 |
SMOOTHED PLOT OF SENSITIVITY +
FOR 7,323 CANCERS THAT WERE IDENTIFIED AT SCREENING MAMMOGRAPHY (AMONG RADIOLOGISTS FINDING 30+ CANCERS), 2007 - 2013
Specificity
| Number of Screening Exams | |
| Specificity§ | 88.9 |
| Readers with 1000+ non-cancers | 249 |
| True Negatives|| | 1,451,753 |
| Non-cancers# | 1,633,101 |
| Specificity (Median-50th percentile) | 89.7 |
| Specificity (25th, 75th percentiles) | 85.8, 92 |
| Specificity (10th, 90th percentiles) | 82.6, 94.1 |
SMOOTHED PLOT OF SPECIFICITY +
FOR 1,633,101 NON-CANCERS THAT WERE IDENTIFIED AT SCREENING (AMONG RADIOLOGISTS FINDING 1000+ NON-CANCERS), 2007 - 2013
False Negative Rate
| Number of Screening Exams | |
| False negative rate (per 1000)†† | 0.7 |
| Readers with 3000+ exams | 174 |
| False negatives‡‡ | 1,156 |
| All examinations | 1,492,669 |
| False negative rate (Median-50th percentile) | 0.7 |
| False negative rate (25th, 75th percentiles) | 0.5, 1 |
| False negative rate (10th, 90th percentiles) | 0.3, 1.3 |
SMOOTHED PLOT OF FALSE NEGATIVE RATE +
FOR 1,492,669 SCREENING MAMMOGRAPHY EXAMS (AMONG RADIOLOGISTS WITH 3000+ EXAMS), 2007 - 2013
Footnotes:
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.
* Includes examinations for radiologists with minimum numbers of cases in a given row as designated; excludes examinations for which the radiologist is unknown.
** 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.
+ For figures, An overlaid solid line indicates the 50th percentile (median), paired dashed lines indicate the 25th and 75th percentiles, and paired dotted lines indicate the 10th and 90th percentiles. A single dashed line below the median indicates the 10th and 25th percentiles are the same and a single dashed line above the median indicates the 75th and 90th percentiles are the same.
Tables and figures 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/."