Effect modification of long-term air pollution exposure on the association of physical activity with COPD hospitalization: a prospective cohort study of 0.5 million Chinese adults.

Lancet Reg Health West Pac · 2025 · PMC12541231 · PMID 41132166

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marginally significantno p-value reported

Comparing participants at the highest (≥29.8 MET-h/d) versus lowest quartile (<10.7 MET-h/d) of physical activity, there were 18–23% statistically significant lower risks among those with low air pollution exposure, but marginally significant elevated risks among those with high air pollution exposure (for PM 2.5 and NO 2 ).

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