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Scientists probe the link between obesity and sleep apnea

NCT ID NCT04793334

Knowledge-focused Sponsor: Brandon Nokes 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 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 106 people with obesity who were scheduled for weight-loss surgery. Researchers measured how their upper airways behaved during sleep and used MRI scans to see if changes after surgery could explain why some develop obstructive sleep apnea and others do not. The goal was to understand the underlying mechanisms, not to test a new treatment.

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 predict which obese patients are at risk for sleep apnea and guide personalized treatments.
What could go wrong
This is an observational study, not a treatment trial. It may not lead to any new therapies, and results may not apply to all patients.

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

106 people

The number who actually took part.

Started

Mar 2021

Finished

May 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

Noting the inclusion and exclusion criteria above, we aim to recruit 110 patients, anticipating 20% drop out and a final n of 90. Further, we aim for to recruit 60 participants with OSA and 30 participants without OSA.

Ages

18 to 65 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

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: * \- Men and women * Ages \>= 18-65 years old * BMI 35 kg/m2--and above * Scheduled for sleeve gastrectomy (bariatric surgery) Exclusion Criteria: * Any cardiovascular, pulmonary or renal disease other than well-controlled hypertension or asthma. * Pregnancy * Currently smoking * Any respiratory disorder other than OSA or well controlled asthma * contraindication to MRI

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Conditions

The condition(s) this trial relates to.

Obesity obesity disorder obstructive sleep apnea syndrome

As listed by the trial registrant

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

Obesity Obstructive sleep apnea

Contacts and locations

Locations

  • UCSD - Altman Clinical Research Institute (ACTRI)

    La Jolla, California, 92037, United States

More trials for these conditions

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