Can tweaking risk numbers make women believe their breast cancer odds?
NCT ID NCT07793721
First seen Aug 28, 2026 · Last updated Aug 28, 2026
Summary
Researchers are testing whether the format of a breast cancer risk estimate affects how much women believe it. Women aged 39 to 74 will receive a personalized risk estimate online, with some seeing risk over 5, 10, or 30 years, and others seeing it out of 100 or 1,000 women. Some women will also read answers to common questions about how the risk is calculated. The study asks whether these different presentations change women's skepticism about their risk.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- Behavioral intervention: different formats of presenting breast cancer risk estimates and exposure to frequently asked questions
- What this could lead to
- If it works, this could point toward better ways to communicate breast cancer risk, helping women make more informed screening decisions.
- What could go wrong
- This is an online survey study, not a treatment trial, so it won't change health outcomes directly. Results may not apply to all women or real-world settings.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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About 3,000 people
The number the study aims to enrol. It can still change while the study runs.
- Expected to start
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Sep 2026
An estimate. Start dates often move.
- Expected to finish
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Apr 2027
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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39 to 74 years
- Sex
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Female participants only
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: 1. Female sex 2. Age 39-74 (i.e., people who are eligible for routine breast cancer screening and for whom guidelines recommend an informed, risk-based decision) 3. English literacy Exclusion Criteria: 1\. Prior diagnosis of 1. breast cancer 2. Ductal carcinoma in situ (DCIS) 3. Lobular carcinoma in situ (LCIS) 4. Known BRCA1/2 gene mutation 5. Cowan syndrome 6. Li-Fraumeni syndrome 7. Having received previous chest radiation for treatment of Hodgkin's lymphoma.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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University of Colorado Anschutz Medical Campus
Aurora, Colorado, 80045, United States
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