Screening Mammography Sensitivity, Specificity, & False Negative Rate 2007-2013

Sensitivity, Specificity, and False negative rate for 1,682,504 Screening Mammography Examinations from 2007 - 2013

Based on BCSC data through 2013

  Number of Screening Exams
Sensitivity* 86.9%     
True positives 8,529     
Cancers 9,812     
Specificity§ 88.9%     
True negatives|| 1,486,553     
Non-Cancers# 1,672,692     
False negative rate (per 1000)†† 0.8     
False negatives‡‡ 1,283     
All examinations 1,682,504     

Notes:
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.

*  Sensitivity = the percentage of cancers that had an abnormal initial interpretation (BI-RADS category 0, 4, 5; Note: 3 with a recommendation for immediate follow-up was recoded as 0).

†  True Positive = the number of cancers that had an abnormal initial 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 initial interpretation (BI-RADS category 1, 2, or 3 with no recommendation for immediate follow-up).

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

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

††  False negative rate = the rate (per 1000 exams) of false-negative exams.

‡‡  False negatives = the number of cancers that had a negative initial interpretation.

Table numbers last updated March 23, 2017 . 


 

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"The Breast Cancer Surveillance Consortium and its data collection and sharing activities are funded by the National Cancer Institute (P01CA154292). Downloaded xx/xx/xxxx from the Breast Cancer Surveillance Consortium Web site - http://www.bcsc-research.org/."