Withdrawn study aimed to compare oral DNA damage in smokers and vapers
NCT ID NCT06983392
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study was designed to measure DNA damage in cells from the mouth of smokers, vapers, and people who do not use tobacco or nicotine products. The goal was to find which types of damage might be more likely to cause oral cancer. However, the study was withdrawn before any participants were enrolled.
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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.
- Expected to start
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Mar 2026
An estimate. Start dates often move.
- Expected to finish
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Jul 2030
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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21 years and older
- Sex
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Anyone
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
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Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * 21+ years old * Good physical and mental health * Stable physical and mental health * Either 1) smokes cigarettes daily, 2) vapes daily, 3) does not use any tobacco or nicotine products Exclusion Criteria: * Pregnant or nursing * High blood pressure * Unstable health condition(s) * History of cancer or liver disease
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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.
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