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Saliva swab could spot drowsy drivers before they crash

NCT ID NCT07089342

Knowledge-focused Sponsor: University of Zurich Source: ClinicalTrials.gov ↗

What the study statuses mean

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Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study looked at whether chemicals in saliva can show when a driver is dangerously sleepy. Over 500 drivers stopped by police in Belgium gave a saliva sample and reported their sleepiness level. Researchers hope to find a biological marker that could one day be used to prevent drowsy driving accidents.

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

511 people

The number who actually took part.

Started

Aug 2025

Finished

Dec 2025

Lead sponsor

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

Drivers (all vehicle types, aged 18 or older) voluntarily participating after being randomly stopped during roadside police checks in Belgium

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show 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: * drivers randomly stopped by the police Exclusion Criteria: * refusal to sign informed consent

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Conditions

The condition(s) this trial relates to.

Fatigue Sleepiness

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Drowsiness Fatigue Sleepiness

Contacts and locations

Locations

  • Vias institute

    Brussels, Belgium

More trials for these conditions

Other studies related to the condition(s) this trial covers.