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Published on: November 14, 2025
Promoting screening mammography: insight or uptake?
1Department of Radiology, Cook County John H. Stroger Jr. Hospital, Chicago, IL 60612-9985, USA. jkeen@ccbhs.org
Journal of the American Board of Family Medicine : JABFM
|November 9, 2010
Summary
Screening mammography for women aged 40-49 offers minimal life-saving benefits but significant harms like overdiagnosis. Women are 10 times more likely to face overtreatment than to have their lives saved by screening.
Area of Science:
- Medical Screening
- Preventive Medicine
- Radiology
Background:
- The US Preventive Services Task Force recommends individualized decisions for mammography screening in women aged 40-49.
- Public opinion often favors screening mammography due to the "early detection saves lives" message, potentially overlooking associated harms.
Purpose of the Study:
- To enhance physician and patient understanding of the age-related benefits and harms of screening mammography.
- To critically evaluate the effectiveness and risks of mammography screening for women in their 40s.
Main Methods:
- Analysis of data on screening mammography outcomes, including cancer detection rates, overdiagnosis, and overtreatment.
- Calculation of the number of screenings, diagnostic exams, and biopsies required to save one life in the target age group.
Main Results:
- Routine screening mammography at age 50 saves approximately 1 life per 1000 women over 10 years.
- Nearly half of screen-detected cancers are pseudo-disease, and women aged 40-49 are 10 times more likely to experience overdiagnosis and overtreatment than benefit from life-saving screening.
- Saving one life requires approximately 9600 screening mammograms, 960 diagnostic exams, and 90-140 biopsies for women aged 40-49.
Conclusions:
- The harms of screening mammography, including overdiagnosis and overtreatment, significantly outweigh the benefits for women aged 40-49.
- Advocates should shift focus from promoting screening uptake to promoting informed decision-making and insight into the risks and benefits.
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