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Table 2 Association between exposure to air pollution and stroke hospital admission (per 10 μg/m3 increment)

From: Association between exposure to ambient air pollution and hospital admission, incidence, and mortality of stroke: an updated systematic review and meta-analysis of more than 23 million participants

Air pollution

Hospital admission

Heterogeneity

NO.

HR (95% CI)

I2 (%)

P

PM2.5

19

1.008 (1.005, 1.011)

96.6

0.000

PM10

15

1.004 (1.001, 1.006)

92.7

0.000

SO2

13

1.013 (1.007, 1.020)

94.5

0.000

NO2

15

1.023 (1.015, 1.030)

92.6

0.000

CO

8

1.000 (1.000, 1.001)

92.7

0.000

O3

15

1.002 (1.000, 1.003)

80.2

0.000

  1. HR hazard ratio, NO. number, PM2.5 particulate matter with aerodynamic diameter less than 2.5 μm, PM10 particulate matter with aerodynamic diameter less than 10 μm, SO2 sulfur dioxide, NO2 nitrogen dioxide, CO carbon monoxide, O3 ozone