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Table 3 Correlation between particulate matter and nitrogen oxides

From: The effect of short term exposure to outdoor air pollution on fertility

Pollutant

 

NO2

Exposure window

15D

3D

D0

D7

PM2.5

15D

0.48

   

3D

 

0.56

  

D0

  

0.51

 

D7

   

0.45

PM2.5 abs

15D

0.88a

   

3D

 

0.90a

  

D0

  

0.91a

 

D7

   

0.91a

PM coarse

15D

0.55

   

3D

 

0.56

  

D0

  

0.56

 

D7

   

0.59

PM10

15D

0.53

   

3D

 

0.55

  

D0

  

0.55

 

D7

   

0.59

 

PM2.5

NO2

15D

0.55

   

3D

 

0.56

  

D0

  

0.53

 

D7

   

0.60

NOx

15D

0.57

   

3D

 

0.59

  

D0

  

0.58

 

D7

   

0.59

  1. NO2 nitrogen dioxide, PM2.5 particulate matter (PM) with aerodynamic diameter ≤2.5 μm, PM2.5 abs a surrogate of black carbon, PM coarse PM with aerodynamic diameter between 2.5 and 10 μm, PM10 PM with aerodynamic diameter ≤ 10 μm, NOx nitrogen oxide, 15D period of 15 days before the embryo transfer, 3D period of 3 days before the embryo transfer, D0 the day of the embryo transfer, D7 period of 7 days after the embryo transfer
  2. aHigh correlations indicate collinearity, and result in unstable estimates when adjusting models by co-pollutants
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Reproductive Biology and Endocrinology

ISSN: 1477-7827

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