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Benchmarks for Abnormal Screening Mammography Interpretations 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
Recall rate (RR) 10.6%
Readers with 1000+ examinations 450
Abnormal interpretations 350,609
All examinations 3,294,680
RR (Median - 50th percentile) 10.9
RR (25th, 75th percentiles) 7.9, 14.5
RR (10th, 90th percentiles) 5.4, 17.8
PPV1 (abnormal interpretation)§ 4.4%
Readers with 100+ abnormal interpretations 463
Cancers 15,596
Abnormal interpretations 354,085
PPV1 (Median - 50th percentile) 4.2
PPV1 (25th, 75th percentiles) 3.1, 5.6
PPV1 (10th, 90th percentiles) 2.2, 7.0
PPV2 (biopsy recommended)|| 25.4%
Readers with 30+ biopsy recommended 355
Cancers 12,006
Abnormal interpretations 47,260
PPV2 (Median - 50th percentile) 25.4
PPV2 (25th, 75th percentiles) 18.4, 33.0
PPV2 (10th, 90th percentiles) 13.6, 38.8
PPV3 (biopsy performed)# 31.0%
Readers with 30+ biopsy performed 270
Cancers 9,930
Abnormal interpretations 32,031
PPV3 (Median - 50th percentile) 32.0
PPV3 (25th, 75th percentiles) 24.1, 38.7
PPV3 (10th, 90th percentiles) 18.8, 46.6

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

Recall rate = The percentage of examinations interpreted as abnormal (BI-RADS category 0,4,5 or 3 with a recommendation for immediate work-up)

§ PPV1 = The percentage of examinations with an abnormal interpretation that results in a tissue diagnosis of cancer within 1 year

|| PPV2 = The percentage of examinations interpreted as suspicious or highly suggestive of malignancy (BI-RADS 4,5) that results in a tissue diagnosis of cancer within 1 year

# PPV3 = The percentage of known biopsies performed as a result of an examination interpreted as suspicious or highly suggestive of malignancy (BI-RADS 4,5) that results in a tissue diagnosis of cancer within 1 year

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/table5.html .

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