Table 2

Concentrations (µg/m3) of air pollutants during the two exposure periods, Espoo, Finland

PollutantsMean±SDMinimum25th percentile50th percentile75th percentileIQRMaximum
During entire pregnancy (n=2525)
 PM2.5 19.62±4.503.0116.9319.5322.105.1738.48
 PM10 21.35±5.123.1718.4721.1524.065.5943.78
 NO2 8.72±2.490.437.348.9310.262.9217.68
 CO363.80±63.49147.81325.50364.90406.5281.02594.80
 SO2 11.10±5.490.537.7710.5613.275.544.76
 O3 50.27±5.9123.6845.7450.5754.959.2178.06
First year of life (n=2532)
 PM2.5 19.21±3.823.0917.0619.0721.314.2537.88
 PM10 20.95±4.353.2418.6320.7023.184.5543.85
 NO2 8.66±2.200.487.368.8210.052.6917.02
 CO362.37±55.01159.97325.88371.02397.9272.04574.98
 SO2 10.43±4.760.587.579.8512.595.0243.16
 O3 51.05±2.8535.0849.1450.9753.162.1981.04
  • CO, carbon monoxide; NO2, nitrogen dioxide; O3, ozone; PM10, particulate matter with a diameter of 10 μm; PM2.5, particulate matter with a diameter of 2.5 μm; SO2, sulfur dioxide.