The relative risk (RR) associated with dioxin exposure was
therefore computed as .
Under a high exposure scenario, we have a priori defined
x1 (the reference concentration) as the 2.5th percentile
(1.25 × 10-4 μg/m2/year), and x2 as the 90th percentile
(1.78 × 10-2 μg/m2/year) of the dioxin exposure distribu-tion within the modelled zones (Figure 2).
Models were run with R software (package mgcv) and
WinBUGS software [22,23].