Harvard Scientists Reveal That Air Pollution May Increase Risk of Dementia — A new meta-analysis from H |
This meta-analysis, which includes the most recent studies evaluating the link between air pollution and dementia, is the first to include studies based on active case ascertainment and to evaluate studies using a new, more powerful bias assessment tool. The findings support the public health importance of a proposal, currently under consideration by the Environmental Protection Agency, to strengthen regulations on PM2.
The study is the first systematic review and meta-analysis to use the new Risk of Bias In Non-Randomized Studies of Exposure tool, which addresses bias in environmental studies in greater detail than other assessment approaches. Additionally, it’s the first study that incorporates more recent research utilizing “active case ascertainment.
The researchers found consistent evidence of an association between PM2.5 and dementia, even when annual exposure was less than the current EPA annual standard of 12 micrograms per cubic meter of air In particular, among the studies using active case ascertainment, the researchers found a 17% increase in risk for developing dementia for every 2 μg/m3 increase in average annual exposure to PM2.5.
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