Breast cancer risk prediction model: a nomogram based on common mammographic screening findings
Current model is a tool assisting screening radiologists in determining the chance of malignancy based on mammographic findings. Cutoff values were proposed for assigning BI-RADS (Breat Imaging Reporting and Data System) in the Dutch programme, which will need to be validated in future research. 

Note: This online calculater estimates an individual's risk using a logistic regression formula. The formula is derived from the published nomogram which may be slightly deviant from the original logistic regression formula. 
Research authors: J.M.H. Timmers, A.L.M. Verbeek, J. IntHout, R.M. Pijnappel, M.J.M. Broeders, G.J. den Heeten
Details Formula Study characteristics Files & References
Model author
Model ID
Revision date
MeSH terms
  • Breast Cancer
  • Screening
  • Mammography
  • Nomogram
  • Model type
    Logistic regression (Calculation)
    No Formula defined yet
    Condition Formula

    Additional information

    Data of 417 women were reviewed. Included were women who participated in the Nijmegen screening programme and were recalled to their general practitioner and a hospital for further assessment on the basis of an abnormal screening mammogram (December 2006 to November 2008). All women consented to the use of their anonymous data for scientific research. Thedatabase consisted of digital mammograms, including previous screening examinations.
    After exclusion, 352 screening mammograms were analysed.

    Study Population

    Total population size: 352
    Males: {{ model.numberOfMales }}
    Females: {{ model.numberOfFemales }}

    Categorical characteristics

    Name Subset / Group Nr. of patients
    BI-RADS 4 198
    BI-RADS 5 34
    Mass Well defined 60
    Ill defined 55
    Spiculated 24
    Density of mass Low density 13
    High density 24
    Fibroglandular density 102
    Cluster calcifications No 171
    Yes 181
    Architectural distortion No 332
    Yes 20
    Focal asymmetry No 304
    Yes 48
    Mammographic density ACR 1 49
    ACR 2 161
    ACR 3 106
    ACR 4 36
    Breast cancer risk prediction model: a nomogram based on common mammographic screening findings
    Refer to Intended Use for instructions before use
    Evidencio B.V., Irenesingel 19, 7481 GJ, Haaksbergen, the Netherlands

    Related files

    Supporting Publications

    The risk of breast cancer is:

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    Notes are only visible in the result download and will not be saved by Evidencio

    The risk of breast cancer is:

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    Outcome stratification

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    Conditional information

    Result interpretation

    The cutoff points for the proposed BI-RADS categories can easily be adapted for use in other screening practices.

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    Calculations alone should never dictate patient care, and are no substitute for professional judgement. See our full disclaimer.

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