US EditionMeta-Analysis Links Air Pollutants to Elevated Dementia Risk
CANADA, JUL 25 – Long-term exposure to fine particulate matter, nitrogen dioxide, and soot raises dementia risk by up to 17%, affecting millions worldwide, according to a meta-analysis of nearly 30 million people.
- British researchers said significant evidence of a pollution‐dementia link, analysis drew on 51 studies and over 29 million participants.
- Early research established an uncertain link between wildfire smoke and dementia, with researchers linking smoke inhalation to cognitive risk in 2022.
- Researchers found that every 1 µg/m³ increase in wildfire PM2.5 was associated with an 18% higher dementia risk, and every 10 µg/m³ rise in PM2.5 was linked to a 17%, though these findings were no longer statistically significant after reanalysis.
- In 2020, a heavy fire year, smoke drove nearly 37,000 excess deaths, and emergency hospitalizations climbed after days in dense smoke, Mickley and co-authors noted.
- By 2050, dementia cases are expected to triple to 153 million, and researchers pinpoint ages 45 to 69 as a critical window for pollution-driven brain damage.
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Too high fine dust pollution not only harms the airways: Dirty air also increases the risk of developing dementia, as a new evaluation now shows.
·Munich, Germany
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Medical XpressReposted by 
University of Cambridge
University of CambridgeLong-term exposure to outdoor air pollution linked to increased risk of dementia
An analysis of studies incorporating data from almost 30 million people has highlighted the role that air pollution—including that coming from car exhaust emissions—plays in increased risk of dementia.
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Total News Sources28
Leaning Left7Leaning Right0Center4Last UpdatedBias Distribution64% Left
Bias Distribution
- 64% of the sources lean Left
64% Left
L 64%
C 36%
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