TABLE 3

Distribution of annual average exposure concentrations for time windows of exposure and short-term exposures, for the cross-sectional analyses population (n=721)

Time windowMinimumMaximumMedianMean±sdIQR75th percentile
Preschool
 NO2 µg·m−310.344.421.521.3±5.57.424.8
 PM2.5 absorbance 10−5·m−10.82.11.21.2±0.20.31.2
 PM2.5 µg·m−314.919.416.416.2±0.71.216.6
 PM10 µg·m−323.728.624.424.6±0.70.924.8
 PMcoarse µg·m−37.511.18.18.2±0.50.58.3
Primary school
 NO2 µg·m−310.344.420.920.7±5.27.624.3
 PM2.5 absorbance 10−5·m−10.81.91.11.1±0.20.31.2
 PM2.5 µg·m−314.919.416.416.2±0.71.216.6
 PM10 µg·m−323.728.524.324.5±0.70.824.8
 PMcoarse µg·m−37.510.77.98.1±0.40.58.3
Secondary school
 NO2 µg·m−310.344.420.920.6±5.37.924.3
 PM2.5 absorbance 10−5·m−10.81.81.11.1±0.20.31.2
 PM2.5 µg·m−314.818.716.416.2±0.61.216.6
 PM10 µg·m−323.727.724.324.5±0.70.824.7
 PMcoarse µg·m−37.510.77.98.1±0.40.58.3
Short term exposures#
 NO224.142.714.715.9±6.89.620.1
 PM108.346.515.818.5±7.06.820.3

IQR: interquartile range; NO2: nitrogen dioxide; PMx: particles with a 50% cut-off aerodynamic diameter of x µm; PMcoarse: particles with a 50% cut-off aerodynamic diameter of 2.5–10 µm. #: average concentrations for the 7 days preceding the 16-year lung function measurement.