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COPD's hidden toll on the brain revealed

NCT ID NCT03269721

Knowledge-focused Sponsor: Karin Hoth 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 26, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This completed study looked at 170 smokers with COPD to understand how lung damage affects brain structure and thinking skills. Participants took memory and thinking tests, had lung function tests, and underwent brain scans. The goal was to find early clues that could one day lead to treatments to protect the brain.

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 research could point toward ways to delay or prevent memory and thinking problems in people with COPD.
What could go wrong
This is an observational study, not a treatment trial. It only looks for links between lung health and brain changes, so it won't directly lead to a new therapy.

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

170 people

The number who actually took part.

Started

May 2017

Finished

Apr 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

Participants will be recruited from the Iowa COPD research registry, which includes participants from several NIH funded studies with quantitative lung imaging obtained in the Iowa Comprehensive Lung Imaging Center.

Ages

30 to 85 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: Age 30-85, \> 8th grade education, Normal/corrected hearing and vision, English Speaker, Ability to comfortably lie flat for 1 hour. Exclusion Criteria: Other concomitant respiratory disorder other than asthma (e.g., cystic fibrosis), Use of antibiotics or steroids for a COPD exacerbation within the past month, Use of 24-hour oxygen, Pregnancy or suspected pregnancy, Uncontrolled cancer within the last 5 years, Radiation therapy to the chest, Lung surgery (LVRS, transplant, lobectomy), Lung cancer known or suspected, Eye surgery in the last 3 months, Pulmonary Hypertension, Insulin-dependent diabetes, Inability to use albuterol, Chest or abdominal surgery in the past 3 months, Heart attack in the last 3 months, Hospitalization for any heart problem in the past month, Prior neurological condition (e.g., stroke, epilepsy, head injury with \>15 mins. loss of consciousness), Previous diagnosis of dementia or learning disability, Major comorbid medical conditions with known cognitive effects (e.g., renal failure, HF), Psychotic disorder, bipolar disorder, current substance use disorder other than tobacco use, Change in psychiatric medication in last month, Claustrophobia, Metal object in body that may interfere with neuroimaging.

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Conditions

The condition(s) this trial relates to.

chronic obstructive pulmonary disease Cognitive Dysfunction COPD, severe early onset lung disorder

As listed by the trial registrant

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

Cognitive impairment Pulmonary disease, chronic obstructive (COPD)

Contacts and locations

Locations

  • University of Iowa

    Iowa City, Iowa, 52242, United States

More trials for these conditions

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