Skip to main content

Table 5 Maternal exposure to background pollutants and BETX

From: Maternal exposure to air pollution before and during pregnancy related to changes in newborn's cord blood lymphocyte subpopulations. The EDEN study cohort

  Total study sample Non-smoking mothers with BETX assessment
Mean ± SD (μg/m3) NO2 PM10 Benzene Toluene Ethylbenzene Xylenes*
Window of exposure time n = 370 n = 56
Before pregnancy       
   3 months bf 27.6 ± 13.0 22.0 ± 6.7     
During pregnancy       
   1st trimester 28.2 ± 12.7 21.8 ± 5.8     
   2nd trimester 28.2 ± 11.3 21.8 ± 5.2 3.3 ± 2.0 41.5 ± 16.5 5.1 ± 2.0 23.3 ± 8.7
   3rd trimester 26.7 ± 12.1 21.9 ± 6.4     
  1. * Sum of o-xylene, m-xylene and p-xylene. SD, standard deviation; bf, before; BETX, benzene, ethylbenzene, toluene, xylenes.