Skip to main content

Table 1 Descriptive statistics of the estimates of individual exposure to ambient NO2 during the different pregnancy periods.

From: Air pollution exposure during pregnancy and reduced birth size: a prospective birth cohort study in Valencia, Spain

Pregnancy period Mean (μg/m3) Percentiles (μg/m3) Pearson's correlation (r) between periods
   25 50 75 First trimester Second trimester Third trimester
First trimester 37.9 28.2 38.1 48.5    
Second trimester 35.9 26.5 35.2 44.2 0.69*   
Third trimester 37.0 27.3 37.0 46.1 0.34* 0.65*  
Whole pregnancy 36.9 29.4 37.9 45.6 0.80* 0.92* 0.83*
  1. *p < 0.001
  2. INMA-Valencia cohort, 2003-2006