Massive cancer screening trial aims to cut deaths
NCT ID NCT00339495
First seen Jun 24, 2026 · Last updated Aug 07, 2026 · Updated 7 times
Summary
This study is testing whether regular screening for prostate, lung, colorectal, and ovarian cancers can reduce deaths from these diseases. About 154,900 men and women aged 55-74 were randomly assigned to either get screened or receive usual care. Researchers are tracking cancer cases and deaths over many years to see if screening makes a difference.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
- What this could lead to
- If successful, this could show that regular screening helps catch these cancers early and reduce deaths.
- What could go wrong
- This is an observational study, not a treatment trial. Screening may not lower death rates and could lead to unnecessary procedures or anxiety.
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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.
Contacts and locations
Locations
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Westat, Inc.
Rockville, Maryland, 20850, United States
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