Table 13 Relative risk (RR) and 95% CI of cardiovascular and cerebrovascular diseases across PM2.5 exposure quartiles.

From: The influence of meteorological factors and air pollution on acute cardiovascular and cerebrovascular events in Western Guizhou

PM2.5 Quartile

PM2.5 concentration range (µg/m³)

RR (95% CI)

p-value

Q1 (Lowest)

≤ 13.1

1.02 (0.95–1.09)

0.48

Q2

13.2–21.3

1.05 (0.98–1.12)

0.14

Q3

21.4–33.1

1.10 (1.03–1.18)

0.006

Q4 (Highest)

≥ 33.2

1.16 (1.08–1.25)

< 0.001

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