Multi-Center Clean Air Randomized Controlled Trial in COPD
NCT ID: NCT06376994
Last Updated: 2025-10-10
Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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RECRUITING
PHASE3
770 participants
INTERVENTIONAL
2024-05-24
2029-11-30
Brief Summary
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Detailed Description
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Conditions
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Study Design
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RANDOMIZED
PARALLEL
PREVENTION
QUADRUPLE
Study Groups
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Active air cleaner
The active arm will receive two active air cleaners with high efficiency particulate air (HEPA) filters which remove particulate matter (PM), as well as activated carbon filters to remove Nitrogen Dioxide (NO2) and other trace gases.
Air cleaner
The intervention is two active air cleaners with high efficiency particulate air (HEPA) filters which remove PM, as well as activated carbon filters to remove NO2 (and other trace gases). These will be run for a year in a participant's house.
Sham air cleaner
The sham control treatment arm will receive two sham air cleaners that have the internal HEPA and carbon filters removed, but which will run normally, including similar noise, airflow, and overall appearance compared to active air cleaners, thus blinding participants to filter status.
Sham air cleaner
The sham intervention is two sham air cleaners that have the internal HEPA and carbon filters removed, but which will run normally, including similar noise, airflow, and overall appearance compared to active air cleaners, thus blinding participants to filter status. These will be run for a year in a participant's house.
Interventions
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Air cleaner
The intervention is two active air cleaners with high efficiency particulate air (HEPA) filters which remove PM, as well as activated carbon filters to remove NO2 (and other trace gases). These will be run for a year in a participant's house.
Sham air cleaner
The sham intervention is two sham air cleaners that have the internal HEPA and carbon filters removed, but which will run normally, including similar noise, airflow, and overall appearance compared to active air cleaners, thus blinding participants to filter status. These will be run for a year in a participant's house.
Eligibility Criteria
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Inclusion Criteria
1. Age ≥ 40 years.
2. Self-report of physician diagnosis of COPD.
3. Spirometry confirmed airway obstruction (post-bronchodilator spirometry of forced expiratory volume in 1 second (FEV1)/forced vital capacity (FVC) \< 0.7) as defined by the Global Initiative for Obstructive Lung Disease (GOLD) criteria (6, 11)
4. Tobacco exposure ≥ 10 pack-years. This refers to regular cigarette tobacco consumption.
5. Self-reported former smoker of at least 6 months' duration. This does not include e-cigarette use.
6. COPD Assessment Test (CAT) score ≥ 10, Modified Medical Research Council dyspnea scale (mMRC) ≥ 2, or history of moderate or severe exacerbation in the past 12 months (as defined by history of receiving a course of systemic corticosteroids or antibiotics for respiratory problems; or visiting an emergency department or being hospitalized for a COPD exacerbation within the past 12 months.)
Exclusion Criteria
1. Living in a location other than home (e.g., long-term care facility, nursing home)
2. Other chronic lung diseases, except asthma
3. Condition with less than a year of life expectancy (e.g., metastatic cancer) or in hospice
4. Spends \>2 months per year in location other than home; or plans to change residence in the next 12 months
5. Pregnant or breastfeeding
6. Current air cleaner use in the home (\*If the individual is willing to discontinue use of the personal air cleaner, this person can be eligible if all other eligibility has been met)
7. Inability to bring air cleaners (about 15 pounds each) into home, either by self, friend, or relative
8. Deemed by the study investigator to be unable to complete study protocol, including likely lack of internet connectivity
9. Participating in another interventional clinical trial
40 Years
ALL
No
Sponsors
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National Heart, Lung, and Blood Institute (NHLBI)
NIH
JHSPH Center for Clinical Trials
OTHER
Responsible Party
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Stephan Ehrhardt
Associate professor
Locations
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University of Alabama, Lung Health Center
Birmingham, Alabama, United States
University of California, Los Angeles
Los Angeles, California, United States
University of Iowa
Iowa City, Iowa, United States
University of Maryland
Baltimore, Maryland, United States
Johns Hopkins
Baltimore, Maryland, United States
Tidal Health
Salisbury, Maryland, United States
Beth Israel Deaconess Medical Center
Boston, Massachusetts, United States
University of Michigan
Ann Arbor, Michigan, United States
Dartmouth Hitchcock
Lebanon, New Hampshire, United States
Cleveland Clinic
Cleveland, Ohio, United States
Reading Hospital
West Reading, Pennsylvania, United States
Countries
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Central Contacts
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Facility Contacts
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Other Identifiers
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IRB00407311
Identifier Type: -
Identifier Source: org_study_id
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