Landscape fire PM<sub>2.5</sub> and hospital admissions for cause-specific cardiovascular disease in urban China.

The estimates for CVD were greater for patients aged 75 years and older compared to those aged 18 to 64 years but the difference did not reach statistical significance ( P = 0.323).

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Studies reported that the ratio of particulate matter from landscape fires to total dust, as well as the ratio of its concentration to ambient PM 2.5 , has both shown an increasing trend, indicating a potential increase in the environmental influence caused by landscape fire PM 2.5 pollution 21 .

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