Airports, Air Quality, and Children's Asthma Near SeaTac Airport
The Airports, Air Quality, and Asthma (AAA) Study
This trial tests whether putting HEPA portable air cleaners in homes helps reduce indoor pollution and improve asthma health for children aged 6–12 who live near SeaTac Airport.
Quick facts
| Phase | Not applicable |
|---|---|
| Study type | Interventional |
| Enrollment | 60 (estimated) |
| Ages | 6 Years to 12 Years |
| Sex | All |
| Sponsor | University of Washington Academic / other |
| Locations | 1 site (Seattle, Washington) |
| Trial ID | NCT07047430 on ClinicalTrials.gov |
What this trial studies
This is a randomized trial in South King County that compares homes given a portable HEPA air cleaner with homes given a less effective portable cleaner (no HEPA). Community health workers recruited from local organizations deliver asthma education and support integration of the intervention into households. Investigators will monitor indoor air pollutant levels and track child asthma outcomes such as symptom frequency, exacerbations, and urgent care visits. The goal is to see if home air filtration can reduce exposure and improve asthma health for children living near airport and highway pollution sources.
Who should consider this trial
Good fit: Children aged 6–12 with a health-care-provider diagnosis of asthma who live within 10 miles of Seattle–Tacoma (SeaTac) Airport, sleep at the caregiver's home at least five nights per week, and have an English-speaking caregiver able to complete study activities.
Not a fit: Children with severe baseline asthma, households with multiple eligible asthmatic members, families planning to move within three months, or those living outside the 10-mile SeaTac radius are unlikely to benefit from this specific trial.
Why it matters
Potential benefit: If successful, the intervention could lower indoor particulate exposure and reduce asthma symptoms, attacks, and urgent care visits for children living near airports.
How similar studies have performed: Previous studies have shown HEPA filtration can improve indoor air quality and reduce asthma symptoms and exacerbations, but using this approach specifically for children exposed to airport-related pollution has not been established.
Eligibility criteria
Show full inclusion / exclusion criteria
Inclusion Criteria: * Child is 6-12 years old with a health care provider-diagnosed asthma. * Caregiver is comfortable in participating in all study activities in English (communicating with study staff by phone and completing online surveys). * Caregiver is familiar with the child's daily asthma health. * Residence within 10 miles of Seattle-Tacoma International Airport as determined by zip code * Child resides in caregiver's home at least five nights a week on a regular basis and has no plans to move in the next three months. Exclusion Criteria: * Child has severe asthma at baseline. Severe asthma was defined in consultation with pediatric pulmonologists to be caregiver-reported asthma symptoms every day over the past 14 days and/or two or more inpatient hospitalizations for asthma in the past 12 months. * Households were excluded if there were multiple individuals within the same household with asthma eligible for the King County CHW Asthma Program or had severe asthma.
Where this trial is running
Seattle, Washington
- University of Washington — Seattle, Washington, United States (Recruiting)
Study contacts
- Principal investigator: Elena Austin, Sc.D. — University of Washington
- Study coordinator: Christine Loftus, PhD, MPH
- Email: cloftus@uw.edu
- Phone: 206-753-9079
How to participate
- Review the eligibility criteria above with your treating physician.
- Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
- Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.