3.5 Combined effects of different periods of exposure to air
pollutants on eczema in children
Pollutants during pregnancy and the first year after birth were included
in the WQS model. For per 25 percentiles increased in the WQS index of
combined exposure to pollutants, the risk of eczema at 1 year of age was
increased by 1.38 times (95%CI : 1.14-1.66), O3during pregnancy played a major role in the combined effect, and
SO2, O3, CO and PM in the first year of
birth also played an important role (Figure 4).