Benchmarks for Abnormal Screening Mammography Interpretations

BENCHMARKS FOR ABNORMAL SCREENING MAMMOGRAPHY INTERPRETATIONS,

BASED ON BCSC DATA, 2007 - 2013 *


Recall Rate

 

 

  Number of Screening Exams
Recall rate (RR) 11.50%
Readers with 1000+ examinations 249
Abnormal initial interpretations 189,682
All examinations 1,642,690
RR (Median - 50th percentile) 10.8
RR (25th, 75th percentiles) 8.4, 14.7
RR (10th, 90th percentiles) 6.3, 18.0
SMOOTHED PLOT OF Recall Rate FREQUENCY DISTRIBUTION+
FOR 1,642,690 SCREENING MAMMOGRAMS (AMONG RADIOLOGISTS WITH 1000+ EXAMS)
Smothed frequency distribution of Radiologist recall rate10th percentile 6.3%; 25th percentile 8.4%; median 10.8%; 75th percentile 14.7%; 90th percentile 18.0%

Positive Predictive Value 1 (PPV1)

 

 

  Number of Screening Exams
PPV1§ 4.40%
Readers with 100+ abnormal interpretations 255
Cancers 8,362
Abnormal initial interpretations 191,026
PPV1 (Median - 50th percentile) 4.4
PPV1 (25th, 75th percentiles) 3.2, 5.7
PPV1 (10th, 90th percentiles) 2.5, 7.4
Smoothed Plot of PPV1 Frequency Distribution+
FOR 191,026 SCREENING MAMMOGRaMS WITH ABNORMAL INITIAL INTERPRETATIONS (AMONG RADIOLOGISTS WITH 100+ EXAMS WITH ABNORMAL INITIAL INTERPRETATIONS)
Smothed frequency distribution of PPV1; 10th percentile 2.5; 25th percentile 3.2; median 4.4; 75th percentile 5.7; 90th percentile 7.4

Positive Predictive Value 2 (PPV2)

 

 

  Number of Screening Exams
PPV2|| 25.20%
Readers with 30+ biopsies recommended 172
Cancers 6,893
Abnormal final interpretations 27,358
PPV2 (Median - 50th percentile) 26.1
PPV2 (25th, 75th percentiles) 19.8, 35.6
PPV2 (10th, 90th percentiles) 16.7, 42.3
SMOOTHED Plot of PPV2 Frequency Distribution+
FOR 27,358 SCREENING MAMMOGRAMS WITH ABNORMAL FINAL INTERPRETATIONS FOR WHICH BIOPSY WAS RECOMMENDED (AMONG RADIOLOGISTS WITH 30+ BIOPSIES RECOMMENDED)
Smothed frequency distribution of PPV2; 10th percentile 16.7; 25th percentile 19.8; median 26.1; 75th percentile 35.6; 90th percentile 42.3

Positive Predictive Value 3 (PPV3)

 

 

  Number of Screening Exams
PPV3# 27.90%
Readers with 30+ biopsies performed 125
Cancers 5,414
Abnormal final interpretations, with known biopsy 19,389
PPV3 (Median - 50th percentile) 31.1
PPV3 (25th, 75th percentiles) 23.0, 39.7
PPV3 (10th, 90th percentiles) 19.4, 46.6
Smoother Plot of PPV3 Frequency Distribution+
FOR 19,389 SCREENING MAMMOGRAMS WITH ABNORMAL FINAL INTERPRETATION FOR WHICH BIOPSY WAS RECOMMENDED AND PERFORMED (AMONG RADIOLOGISTS WITH 30+ BIOPSIES PERFORMED)
Smothed frequency distribution of PPV3; 10th percentile 19.4; 25th percentile 23.0; median 31.1; 75th percentile 39.7; 90th percentile 46.6

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 as designated; excludes examinations for which the radiologist is unknown.
‡  Recall rate = the percentage of examinations with an abnormal initial interpretation (BI-RADS category 0, 4, or 5; Note: 3 with a recommendation for immediate follow-up was recoded as 0.)
§  PPV1 = the percentage of examinations with an abnormal initial interpretation that result in a tissue diagnosis of cancer within 1 year.
||  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. (Excludes Chicago)
**  Abnormal final interpretation (BI-RADS category 4 or 5: Note: 0 or 3 with a recommendation for biopsy was recoded as 4).
+ 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 & figures numbers 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 grants from the National Cancer Institute (P01CA154292, U54CA163303), Patient-Centered Outcomes Research Institute (PCS-1504-30370), and Agency for Health Research and Quality (R01 HS018366-01A1). Downloaded xx/xx/xxxx from the Breast Cancer Surveillance Consortium Web site - http://www.bcsc-research.org/. More information regarding the BCSC is available at: http://bcsc-research.org/."