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Benchmarks for Sensitivity and Specificity for 4,032,556 Screening Mammography Examinations from 1996 - 2005 --- based on BCSC data as of 2007

You are viewing the 2007 collection of this data. Data from other times are also available:
  All Screening Examinations**
Sensitivity* 79.0
Readers with 30+ cancers 219
True Positives 12,896
Cancers 16,324
Sensitivity(Median-50th percentile) 81.3
Sensitivity(25th, 75th percentiles) 75.7, 86.4
Sensitivity(10th, 90th percentiles) 67.5, 89.3
Specificity§ 89.8
Readers with 1000+ non-cancers 450
True Negatives|| 2,939,938
Non-cancers# 3,275,015
Specificity(Median-50th percentile) 89.4
Specificity(25th, 75th percentiles) 86, 92.5
Specificity(10th, 90th percentiles) 82.7, 94.9

Notes

Numbers are frequencies unless otherwise indicated.

**  Includes examinations for radiologists with minimum numbers of cases in a given column as designated; excludes examinations for which the radiologist is unknown.

*  Sensitivity = the percentage of cancers that had an abnormal interpretation (BI-RADS category 0,4,5 or 3 with recommendation for immediate work-up)

 True Positive = the number of cancers that had an abnormal 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 interpretation (BI-RADS category 1, 2, or 3 without a recommendation for immediate work-up)

||  True Negative = the number of non-cancers that had a negative interpretation

#  Non-cancers = the number of examinations without a tissue diagnosis of cancer within 1 year following the examination

Table numbers last updated September 19, 2007. The following source must be cited when reproducing this table: NCI-funded Breast Cancer Surveillance Consortium co-operative agreement (U01CA63740, U01CA86076, U01CA86082, U01CA63736, U01CA70013, U01CA69976, U01CA63731, U01CA70040). Downloaded xx/xx/xxxx from the Breast Cancer Surveillance Consortium Web site - http://breastscreening.cancer.gov/statistics/benchmarks/screening/2007/table7.html .

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