Can a simple air filter protect Seniors' hearts from pollution?
NCT ID NCT04103346
First seen Jan 22, 2026 · Last updated Jun 22, 2026 · Updated 26 times
Summary
This study tested whether using a HEPA air purifier at home for four weeks could lower blood pressure in low-income seniors aged 60 and older. Participants lived near roadways with high air pollution. The goal was to see if cleaning indoor air could reduce cardiovascular risks. The study compared real air filters with sham filters (no filter) to measure the effect.
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Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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Contacts and locations
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Locations
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University of Michigan
Ann Arbor, Michigan, 48103, United States
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
Active substance
HEPA air purifier
What this could lead to
If effective, this could point toward a simple, non-drug way to reduce cardiovascular risks from air pollution in vulnerable populations.
What could go wrong
This was a small, early study with only 52 participants, and results may not apply to other groups or settings. The intervention is not a treatment for existing heart disease.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.