Actively Recruiting
Led by University of Washington · Updated on 2025-07-02
60
Participants Needed
1
Research Sites
52 weeks
Total Duration
Children with asthma living near airports are at higher risk of serious asthma attacks due to indoor air pollution from roadway and aircraft traffic. This research evaluates whether using portable air cleaners with HEPA filters can improve indoor air quality and reduce asthma symptoms in these vulnerable children. The study involves collaboration with community health workers (CHWs) delivering asthma education in South King County, Washington, aiming to recruit about 60 children aged 6 to 12 years with asthma. Participants are randomly assigned to one of two groups: one receives a true HEPA air cleaner, and the other receives a sham air cleaner lacking the HEPA and carbon filters but with a pre-filter. Both devices are installed in the child's bedroom during a baseline home visit. The intervention lasts for three months, during which indoor air quality and asthma health are repeatedly assessed. The study integrates CHWs into multiple aspects of the trial, including education and community engagement. Throughout the three-month study and follow-up, caregivers complete weekly questionnaires tracking asthma symptoms and healthcare use. Air quality monitors record indoor pollution levels. Researchers measure outcomes such as weekly symptom days and changes in asthma control scores. The study's findings will help determine if adding HEPA air cleaners to existing asthma education programs benefits children exposed to airport-related pollution.
CONDITIONS
The Airports, Air Quality, and Asthma (AAA) Study
You may qualify if you...
You will not qualify if you...
Complete this quick 3-step screening to check your eligibility
Duration - 2 to 4 weeks
Participants are screened for eligibility to participate in the trial.
1 visit (in-person)
Duration - 3 months
Participants have a portable air cleaner installed in their child's bedroom. The intervention group receives a unit with a HEPA filter, while the control group receives a similar unit without the HEPA and carbon filters.
1 baseline home visit and weekly questionnaire submissions
Duration - 3 months
Participants complete weekly questionnaires tracking asthma symptoms and health care utilization. Indoor and outdoor air quality is monitored throughout the study period.
Weekly questionnaires
Total: 1 location
1
University of Washington
Seattle, Washington, United States, 98195
Actively Recruiting
C
Christine Loftus, PhD, MPH
Study Type
INTERVENTIONAL
Masking
DOUBLE
Allocation
RANDOMIZED
Model
PARALLEL
Primary Purpose
SUPPORTIVE_CARE
Number of Arms
2
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Christine T Loftus, Pamela Lim, Jan Capps...
https://pubmed.ncbi.nlm.nih.gov/41310837Christine Loftus, Pamela Lim, Jan Capps...
https://pubmed.ncbi.nlm.nih.gov/41041530