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High-Altitude sleep study pulled before it began

NCT ID NCT05462834

Knowledge-focused Sponsor: Johns Hopkins University Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

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
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 Results may not be published yet.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 This study
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This status has not been confirmed recently, so it may be out of date.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 aimed to see if giving extra oxygen at night could improve blood sugar control in people living at high altitudes who have sleep-disordered breathing. It was designed for permanent residents of Puno, Peru, but was withdrawn before any participants were enrolled. No results are available.

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.

Started

Dec 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.

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: * Permanent residents of Puno, Peru Exclusion Criteria: * Recent travel to low altitude (\<3000 m) * Oxygen use * Pregnancy * Morbid obesity (BMI \> 40 kg/m2) * Current smoking * Diabetes * Other sleep disorders (e.g. circadian rhythm disorder or insomnia) * Use of open fires in the home (i.e. for cooking or heat) * Chronic Mountain Sickness (CMS) as defined by a daytime oxyhemoglobin saturation \< 85%, Qinghai CMS \>10 or excessive erythrocytosis as defined by hemoglobin \>19 g/dL in women or \>21 g/dL in men.

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Conditions

The condition(s) this trial relates to.

glucose intolerance sleep apnea syndrome

As listed by the trial registrant

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

Glucose intolerance Sleep-disordered breathing

More trials for these conditions

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