Evaluation of a Novel Indoor Air Pollution Intervention Among Older Adults

Part of paid clinical trials in Missoula, Montana.

Sponsor
University of Montana
Study ID
NCT07539987
Status
Not Yet Recruiting

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Conditions

  • Blood Pressure
  • Cardiovascular Diseases
  • Cholesterol
  • Cholesterol, HDL
  • Cholesterol, LDL
  • Glycated Hemoglobin (HbA1c)
  • Health Behavior
  • Indoor Air Quality
  • Particulate Matter

Eligibility Criteria

Sex
ALL
Age
55 Years - 79 Years
Healthy Volunteers
Not accepted

Interventions

  • Air Improvement and Real-time Monitoring for Wellness through Interactive Strategies and Education (AIRWISE) — BEHAVIORAL
    The AIRWISE intervention consists of a 3-pronged approach grounded in the Health Belief Model (HBM) to improve residential indoor air quality through education, equipment, and behavioral cues. To reinforce cues to action, AIRWISE uses alerts from air quality sensors, prompting timely behavioral responses. Specifically, indoor and outdoor air quality alerts act as behavioral cues to promote active engagement and reference a decision matrix with specific recommendations based indoor and outdoor air quality. Recommendations on the decision matrix include simple strategies to reduce air pollution exposures, including increasing use and fan speed of portable air cleaners, opening or closing windows to change ventilation, and changing activities such as physical activity, cooking, and cleaning. This integrated approach promotes sustained behavior change by aligning with all key HBM constructs.
  • Portable Air Cleaner (PAC) Control — OTHER
    Participants will use two PACs in their home according to manufacturer recommendations. PAC Control group participants will not receive further education on air quality or recommendations on PAC use, nor will they receive additional equipment or outdoor AQI alerts. Control participants will use and maintain the PACs at their own discretion.

Study Details

Particulate matter air pollution is the leading environmental risk factor of cardiovascular disease and is increasing in the Western United States due to more frequent and severe wildfires. Older adults are particularly susceptible to both air pollution exposures and the development of cardiovascular disease, and the older adult population in the United States is rapidly growing. Given the converging threats of worsening air quality and an aging population, this clinical trial will evaluate a novel, multifaceted indoor air quality intervention to improve cardiovascular health outcomes among older adults in the wildfire-impacted state of Montana.

Key Dates

Start date
Aug 31, 2026
Status verified
Apr 2026
Primary completion
Jul 31, 2030
Completion
Jul 31, 2030

Study Design

Enrollment
154 participants (estimated)
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION

Arms

  • Experimental: AIRWISE Intervention
    Participants randomized to the AIRWISE Intervention group will use AIRWISE in their homes for 12 months. The AIRWISE group will use two PACs to filter indoor air and two optical PM2.5 sensors with lights that change color in real time according to AQI. In addition, automated outdoor air quality alerts are sent via text and email when outdoor AQI goes above 75 (mid-point of the Moderate AQI category). Outdoor air quality will be referenced from the Environmental Protection Agency or PurpleAir monitor nearest to the participant's home. Based on the indoor and outdoor AQI levels, participants will reference a decision matrix and educational materials to make informed decisions on improving indoor air quality. Education and behavioral strategies are delivered through multiple approaches, including visual aids, handouts, videos, and a magnet with the decision matrix that can be placed in an accessible location in the home.
  • Active Comparator: PAC Control
    Participants randomized to the PAC Control group will use two PACs in their home without additional AIRWISE equipment/education. After randomization, they will be given instructions on study procedures and using the PAC units according to manufacturer recommendations. PAC Control group participants will not receive further education on air quality or recommendations on PAC use, nor will they receive additional equipment or outdoor AQI alerts. They will receive PurpleAir sensors without an AQI light that are for data collection purposes only, and they will not have access to the data throughout the study. Control participants will use and maintain the PACs at their own discretion. At the end of their participation, they will have the option of receiving the additional AIRWISE components.

Primary Outcome Measure

Predicting Risk of CVD EVENTs (PREVENT) Score [ Time Frame: 0, 6, 12 months ]

Central Contacts

Locations (1)

FacilityCityStateZIPSite coordinators
University of MontanaMissoulaMontana59812
Ethan S Walker, PhD
[email protected]
406-243-2063

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By research site
University of Montana· Missoula, MT

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