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

Study Results

Results pending

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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Recruitment Status

RECRUITING

Clinical Phase

NA

Total Enrollment

80 participants

Study Classification

INTERVENTIONAL

Study Start Date

2024-07-30

Study Completion Date

2028-07-31

Brief Summary

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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

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Detailed Description

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Conditions

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Asthma in Children

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

PREVENTION

Blinding Strategy

DOUBLE

Participants Investigators

Study Groups

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Sham filter

Participants in this arm will receive a sham filter for their box fans. These filters receive a MERV rating of 1 and only filter very large particles and debris such as lint, hair and insects. These particles have little to no impact on asthma symptoms. MERV stands for "minimum efficiency reporting value" and a filter receives a MERV rating as determined by the American Society of Heating, Refrigeration, and Air-Conditioning Engineers.

Group Type EXPERIMENTAL

Sham filter

Intervention Type OTHER

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.

MERV 13 filter

Participants in this arm will receive a MERV 13 filter for their box fans. MERV 13 filters trap the majority of small particles, as small as 1 micron. It also traps up to 75% of particles that are as small as 0.3 microns.

Group Type EXPERIMENTAL

MERV 13 filter

Intervention Type OTHER

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.

Interventions

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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.

Intervention Type 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.

Intervention Type OTHER

Eligibility Criteria

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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