Particulate matter and respiratory health in middle-aged and older adults: disentangling size-fractionated and constituent-specific effects under China's clean-air policies.

BMC Med · 2026 · PMC12997920 · PMID 41673676

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marginally significantno p-value reported

A meta-analysis in 2021 reported marginally significant associations of PM 1 with total respiratory diseases and asthma, pooling data from only two and four studies, respectively [ 13 ].

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