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Benchmarks for Abnormal Diagnostic Mammography Interpretations from 2004 - 2008 -- based on BCSC data through 2009 by Indication for Examination*

You are viewing the 2009 collection of this data. Data from other times are also available:
  Work-Up of Abnormal Screening Examination Short-Interval Follow-Up Evaluation of Breast Problem/ No Lump or Lump Unknown Evaluation of Breast Problem/ Palpable Lump All Diagnostic Examinations
Abnormal interpretation rate (AIR) 15.40% 4.70% 7.50% 17.20% 11.20%
Readers with 10+ examinations 397 323 351 319 476
Abnormal final interpretations 19,152 3,127 7,344 7,473 37,324
All examinations 124,546 66,263 98,510 43,493 334,566
AIR (Median - 50th percentile) 13.9 4.3 7.6 15.2 10.4
AIR (25th, 75th percentiles) 9.1, 19.4 2.1, 7.2 4.3, 11.4 11.1, 21.4 6.9, 14.7
AIR (10th, 90th percentiles) 5.6, 27.3 0.0, 10.0 1.9, 15.2 7.5, 29.6 4.5, 20.0
PPV2|| 23.50% 17.50% 25.00% 32.20% 25.60%
Readers with 10+ biopsy recommended 253 95 129 150 324
Cancers 4,372 431 1,642 2,181 9,379
Abnormal final interpretations 18,570 2,456 6,572 6,766 36,681
PPV2 (Median - 50th percentile) 24.3 18.2 27.3 38.5 28.6
PPV2 (25th, 75th percentiles) 17.9, 31.8 11.2, 30.8 20.0, 37.5 26.3, 53.3 20.5, 37.5
PPV2 (10th, 90th percentiles) 12.4, 40.0 7.7, 36.4 13.8, 46.2 16.1, 61.1 14.9, 44.4
PPV3# 27.00% 19.80% 27.80% 36.00% 29.30%
Readers with 10+ biopsy performed 222 77 94 123 280
Cancers 3,976 360 1,282 1,784 8,225
Abnormal final interpretations, with known biopsy 14,747 1,821 4,605 4,960 28,113
PPV3 (Median - 50th percentile) 28.6 21.4 31.4 44.8 33
PPV3 (25th, 75th percentiles) 21.3, 38.2 14.3, 30.8 22.7, 50.0 31.4, 61.5 24.5, 44.3
PPV3 (10th, 90th percentiles) 16.7, 45.3 9.1, 40.0 16.3, 55.6 22.2, 75.0 18.9, 53.7

Notes

Numbers are frequencies unless otherwise indicated.

The first non-zero assessment within 90 days was used as the final assessment for analysis.

* Includes examinations for radiologists who interpreted at least 10 cases in a given column; excludes examinations for which the radiologist is unknown.

The number of radiologists in this column does not equal the sum of radiologists in the other columns. A given radiologist may contribute to each of the preceding columns, but may contribute to this column only once.

Abnormal interpretation rate = the percentage of examinations with an abnormal final interpretation (BI-RADS category 4 or 5; Note: 0 or 3 with a recommendation for biopsy was recoded as 4).

|| PPV2 = the percentage of examinations with an abnormal final interpretation that result in a tissue diagnosis of cancer within 1 year.

# PPV3 = the percentage of examinations with an abnormal final interpretation, where it is known that a biopsy was performed as a result of the abnormal diagnostic examination, that result in a tissue diagnosis of cancer within 1 year.

Table numbers last updated Sept 30, 2013. The following source must be cited when reproducing this table: NCI-funded Breast Cancer Surveillance Consortium (HHSN261201100031C). Downloaded xx/xx/xxxx from the Breast Cancer Surveillance Consortium Web site - http://breastscreening.cancer.gov/statistics/benchmarks/diagnostic/2009/table5.html

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