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Table 2 PM2.5 levels in Ohio 2007 – 2010, by trimester of exposure in pregnancy and preterm status

From: Exposure to airborne particulate matter during pregnancy is associated with preterm birth: a population-based cohort study

 

Preterm births N = 19,027

Term births N = 205,894

 

All live births N = 224,921

 

% PM2.5 ≥ 15 μg/m3

% PM2.5 ≥ 15 μg/m3

p-value

% PM2.5 ≥ 15 μg/m3

First trimester

22.97

21.81

<0.001

21.91

Second trimester

17.30

17.36

0.835

17.36

Third trimester

22.84

18.90

<0.001

19.23

Entire pregnancy

12.94

10.78

<0.001

10.96

  1. % PM2.5 ≥ 15 μg/m3 = percent of births in Ohio with average exposure level exceeding the EPA standard of 15 μg/m3
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Environmental Health

ISSN: 1476-069X