Blood test could spare thousands from unneeded colonoscopies
NCT ID NCT06714318
First seen Jun 29, 2026 · Last updated Jun 30, 2026 · Updated 1 time
Summary
This study investigates whether a blood test can help identify people who have a positive stool test for hidden blood but are actually at very low risk for colorectal cancer. The goal is to reduce the number of unnecessary colonoscopies, which are invasive and strain healthcare resources. Researchers will compare blood biomarker results with colonoscopy findings in 1,000 screening participants.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- blood biomarker test
- What this could lead to
- If successful, this could make colorectal cancer screening more personalized and reduce the number of unnecessary, invasive colonoscopies.
- What could go wrong
- The blood test may not be accurate enough to replace colonoscopy, and the study is still in early stages, so results are not yet proven.
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.
- Participants
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About 1,000 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Dec 2024
- Expected to finish
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Sep 2028
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.
Who is studied
All citizens referred to a colonoscopy at Vejle Hospital or Hospital Sønderjylland in the colorectal cancer screening program.
- Ages
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50 to 74 years
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
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: * Participation in the colorectal cancer screening program. Exclusion Criteria: * Participants are excluded if a colonoscopy is not completed unless this is due to a colorectal cancer obstruction.
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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
2 sites. 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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Hospital Sønderjylland
RECRUITINGAabenraa, 6200, Denmark
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Vejle Hospital
RECRUITINGVejle, 7100, Denmark
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Other studies related to the condition(s) this trial covers.
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- Gut bacteria may hold clues to why some cancer treatments work better
- Burning the edges: a new way to stop colon polyps from coming back
- Missed Follow-Up colonoscopies: do they raise the risk of advanced growths?
- A 2.2 mm scope could spot cancerous tissue in minutes, not days