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Is it asthma or something else? sleep apnea study rethinks wheezing

NCT ID NCT04142905

Knowledge-focused Sponsor: Norfolk and Norwich University Hospitals NHS Foundation Trust 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study looked at the medical records of one person from a sleep clinic to see if their breathing problems were due to a condition called dysanapsis (where airways are smaller than normal) rather than true asthma. The goal was to better understand why some people with sleep apnea also have wheezing. Because it only reviewed one patient's records, the findings are very limited.

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

1 person

The number who actually took part.

Started

Feb 2021

Finished

Apr 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.

Who is studied

Adult patients attending the Obstructive Sleep Apnea Clinic at Norfolk \& Norwich University Hospital NHS Foundation Trust

Ages

18 to 99 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: * Any subject in Obstructive Sleep Apnea clinic. Exclusion Criteria: * Only exclusion criteria is if they have no recorded lung function in their notes

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Conditions

The condition(s) this trial relates to.

asthma obstructive sleep apnea syndrome

As listed by the trial registrant

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

Asthma Dysanapis Obstructive sleep apnoea (OSA)

Contacts and locations

Locations

  • Norfolk and Norwich University Hospitals NHS Foundation Trust

    Norwich, NR4 7UY, United Kingdom

More trials for these conditions

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