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Table 3 Distribution of annual average air pollution concentrations at the participants’ birth address and current home address, and for the period between the 4- and 8-year Rint measurements

From: Air pollution and airway resistance at age 8 years – the PIAMA birth cohort study

  Min P25 Median Mean P75 Max N
Annual average birth address
 NO2 [μg/m3] 9.4 18.9 23.3 23.4 27.3 48.1 975
 NOx [μg/m3] 16.5 27.6 33.5 34.8 38.8 88.9 975
 PM2.5 [μg/m3] 15.3 15.7 16.5 16.4 16.8 21.1 975
 PM10 [μg/m3] 23.7 24.1 24.7 25.0 25.4 33.2 975
 PMcoarse [μg/m3] 7.6 7.8 8.1 8.4 8.7 13.0 975
 PM2.5 absorbance [10− 5/m] 0.85 1.09 1.24 1.25 1.36 2.99 975
Annual average at current addressa
 NO2 [μg/m3] 9.4 18.2 22.7 22.6 26.6 52.1 965
 NOx [μg/m3] 16.5 26.1 32.1 33.3 37.3 100.1 965
 PM2.5 [μg/m3] 14.9 15.6 16.5 16.4 16.8 19.3 965
 PM10 [μg/m3] 23.7 24.0 24.6 24.8 25.2 29.8 965
 PMcoarse [μg/m3] 7.6 7.8 8.0 8.3 8.5 11.2 965
 PM2.5 absorbance [10−5/m] 0.85 1.06 1.22 1.22 1.33 2.13 965
Annual average for the period between the 4- and 8-year Rint measurementb
 NO2 [μg/m3] 9.4 19.1 23.0 22.9 26.7 40.4 519
 NOx [μg/m3] 16.5 27.0 32.8 33.9 37.8 82.7 519
 PM2.5 [μg/m3] 15.3 15.8 16.5 16.4 16.8 20.4 519
 PM10 [μg/m3] 23.7 24.1 24.6 24.9 25.2 33.3 519
 PMcoarse [μg/m3] 7.6 7.8 8.1 8.3 8.5 11.9 519
 PM2.5 absorbance [10−5/m] 0.85 1.09 1.24 1.23 1.33 1.99 519
  1. aAt the time of the 8-year Rint measurement
  2. bonly for participants with successful Rint measurements at both, ages 4 and 8 years