Menu
Recruiting NCT06552013

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

No phase Interventional Asthma in Children

For patients and families

In plain language

An automatic summary of structured registry data. It is an orientation aid, not a substitute for the official protocol or a physician assessment.

What is being studied
The protocol lists: MERV 13 filter, Sham filter.
Who it may be relevant to
Registry conditions: Asthma in Children. Basic parameters: 6 years — 17 years · All.
What needs checking
Age, condition and sex are only basic indicators. Prior treatment, laboratory values and other mandatory requirements appear in the eligibility criteria below.
Where it takes place
United States
Next step
Save the trial, show it to the treating physician, and confirm current recruitment with the study center. Costs, documents and travel →

Unsure about the terms? Read our patient guide →

Overview

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 outcome measures

  • Asthma symptoms [Time frame: 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 [Time frame: 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]
Secondary outcome measures (3)
  • Asthma quality of life [Time frame: Will be evaluated at baseline (visit 1), after 6 weeks (visit 3) and at 6 month follow up (visit 4)]
  • Use of rescue medications [Time frame: 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.]
  • Health care utilization in the past month [Time frame: Will be evaluated at baseline (visit 1), after 6 weeks (visit 3) and at 6 month follow up (visit 4)]

Eligibility criteria

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

Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.

Healthy volunteers: No

Study design

Allocation
Randomized
Model
Parallel assignment
Masking
Double blind
Primary purpose
Prevention

Study locations

United States · 1 center
  • Duwamish River Community Coaltion — Seattle

Identifiers

NCT: NCT06552013 · STUDY00018735 · 1R01ES034749-01

Primary sources (government registries)

View this study on ClinicalTrials.gov ↗