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Action Towards Health Equity and Improved Air Quality in the Duwamish Valley: A Multilevel Asthma Intervention

ClinicalTrials.gov IDNCT06552013

PhaseNA

Enrollment80

SponsorUniversity of Washington

Age6 Years

SexALL

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Conditions studied

Asthma in Children

About this study

The goal of this randomized control trial is to learn if box fans and filters can reduce asthma symptoms and improve indoor air quality in children ages 6 - 17 years old with asthma living in the Duwamish Valley, Seattle, Washington. The main question it aims to answer are: * Do box fans with filters improve asthma symptoms? * Do box fans with filters improve an objective measure used to monitor lung function known as forced expiratory volume during the first second (FEV1)? Researchers will compare children living in households with high quality filters to those in households with sham filters to see if air quality and asthma symptoms improve. Participants will * fill out several questionnaires * monitor their lung function with a peak flow meter * place an air monitor in their homes to monitor indoor air quality * run the box fan when they are at home

Interventions

Other: MERV 13 filter — This is an environmental intervention consisting of a low-cost box fan with a MERV 13 filter placed behind it. The company Lasko makes these fans and other environmental appliances.
Other: Sham filter — This is an environmental intervention consisting of a low-cost box fan with a sham filter (MERV 1) placed behind it. The company Lasko makes these fans and other environmental appliances.

Primary outcomes

Asthma symptoms (ACQ will be measured weekly for 6 consecutive weeks, two pre-intervention weeks (before box fans have been given to participant) and four weeks while fans are being used in the home. Symptoms will also be assessed at the six month follow-up visit.)
FEV1 (FEV1 measures will be taken daily, once in the morning and once at night for the six week study time frame. Prior to the six month follow up we will ask participants to take three consecutive days of FEV1 measurements, for an additional 6 measures)

Eligibility information

Inclusion Criteria: * age (6-17 years) * poorly controlled physician diagnosed asthma defined as more than four days with asthma symptoms in the past two weeks, use of asthma rescue medication for more than four days in the past two weeks, or health care utilization due to asthma in the past year (hospitalization, emergency room visit, or unscheduled clinic visit) * living in Georgetown and South Park neighborhoods of Seattle Exclusion Criteria: * children with unstable housing or shared custody arrangements

Study locations

Duwamish River Community Coaltion, Seattle, Washington 98108 United States

Before you participate: Varda Clinical is an independent discovery tool, not the study sponsor or a medical provider. Eligibility can only be determined by the official study team. Discuss potential risks and benefits with a qualified healthcare professional.

Source: ClinicalTrials.gov. Record last refreshed by Varda Clinical: 2026-09-27.