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. Author manuscript; available in PMC: 2020 Sep 1.
Published in final edited form as: Environ Int. 2019 Jun 21;130:104933. doi: 10.1016/j.envint.2019.104933

Table 2.

Pearson partial correlationsa of pollutants during preconception and first trimester

Preconception First trimester
PM2.5 PM10 NO2 O3 PM2.5 PM10 NO2 O3
Preconception PM2.5 1.00 0.65 0.60 −0.13 0.54 0.33 0.44 −0.30
PM10 1.00 0.48 0.16 0.49 0.55 0.46 −0.33
NO2 1.00 −0.42 0.28 0.18 0.58 −0.37
O3 1.00 0.24 0.26 0.06 0.17
First trimester PM2.5 1.00 0.66 0.63 −0.14
PM10 1.00 0.49 0.15
NO2 1.00 −0.42
O3 1.00
a

All correlations were adjusted for birth year and KPSC medical center service areas and were statistically significant (p < 0.0001). Gray cells indicate correlations between pollutants across exposure windows during preconception and first trimester.