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Altitude alters sleep test results, study finds

NCT ID NCT05826808

Knowledge-focused Sponsor: Tsogyal Latshang Source: ClinicalTrials.gov ↗

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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 Results may not be published yet.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
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Status unknown
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First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study looked at how sleeping at low versus moderate altitude changes sleep test results in 44 healthy adults who live at high altitude. Participants spent one night at low altitude and one at moderate altitude, and their sleep was monitored with a full set of sensors. The goal was to see if altitude affects key measures like oxygen levels and breathing pauses during sleep.

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 help doctors better interpret sleep tests done at different altitudes, improving diagnosis of sleep disorders in mountain regions.
What could go wrong
This is a small, completed study in healthy people, so results may not apply to those with sleep or breathing conditions. The findings are observational and not a treatment.

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

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

44 people

The number who actually took part.

Started

Jun 2023

Finished

Mar 2024

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.

Ages

18 to 70 years

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: * Healthy (no current medical condition or intake of regular medication, except negligible medical issues or accidents not interfering with the current health status or physical performance.) * Living above 1000 m.a.s.l. since at least 1 year * No overnight stay at altitudes \<1000 m.a.s.l. in the previous 4 weeks * 18-70 years old * Body mass index 18,5-30 kg/m2 * informed consent Exclusion Criteria: * Active diseases or health related conditions that require treatment (sleep disorders (mainly sleep apnea), chronic rhinitis, cardiovascular and lung diseases) * Use of drugs that affect the respiratory center drive (sedatives, sleep inducing drugs, opioids), stimulants or illegal drugs * Regular consumption of recreational drugs (alcohol and nicotine included)

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As listed by the trial registrant

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

Healthy

Contacts and locations

Locations

  • Kantonsspital Graubünden

    Chur, Switzerland

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