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Benchmarks for Abnormal Diagnostic Mammography Interpretations from 2002 - 2006 --- based on BCSC data as of 2009 by Indication for Examination*

You are viewing the 2009 collection of this data. Data from other times are also available:

2007

	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)‡	15.3%	4.4%	6.8%	16.2%	10.7%
Readers with 10+ examinations	511	431	420	398	566
Abnormal final interpretations	19,532	3,464	6,638	8,205	38,070
All examinations	127,263	78,837	96,977	50,593	355,562
AIR (Median - 50th percentile)	14.1	4.0	6.7	15.4	10.6
AIR (25th, 75th percentiles)	10.0, 20.0	1.6, 6.8	4.2, 10.7	11.1, 21.4	7.4, 14.3
AIR (10th, 90th percentiles)	6.7, 26.3	0.0, 10.0	1.6, 15.6	7.4, 27.1	5.1, 18.6
PPV₂ (biopsy recommended)^\|\|	24.4%	18.6%	26.3%	35.5%	26.9%
Readers with 10+ biopsy recommended	310	112	125	192	396
Cancers	4,559	488	1,479	2,571	10,062
Abnormal final interpretations	18,678	2,617	5,626	7,235	37,378
PPV₂ (Median - 50th percentile)	24.4	20.3	27.3	38.5	27.1
PPV₂ (25th, 75th percentiles)	16.0, 31.6	10.0, 29.8	19.4, 36.4	27.4, 50.0	19.1, 36.3
PPV₂ (10th, 90th percentiles)	10.1, 41.7	3.8, 36.8	11.1, 50.0	19.0, 62.1	13.9, 45.1
PPV₃ (biopsy performed)^#	28.6%	22.1%	30.9%	41.8%	31.9%
Readers with 10+ biopsy performed	263	77	88	133	337
Cancers	4,028	391	1,170	2,025	8,695
Abnormal final interpretations, with known biopsy	14,102	1,770	3,789	4,847	27,287
PPV₃ (Median - 50th percentile)	27.5	23.5	33.3	44.9	31.8
PPV₃ (25th, 75th percentiles)	18.5, 36.4	15.4, 33.3	24.5, 45.8	34.6, 59.2	23.5, 42.1
PPV₃ (10th, 90th percentiles)	14.3, 50.0	8.7, 37.5	16.4, 61.5	25.0, 68.2	16.7, 54.5

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 -- categories 0 or 3 with a recommendation for biopsy were 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 December 27, 2009. 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/data/benchmarks/diagnostic/2009/table5.html

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