Forward model selection to predict creatinine-adj. U-Cd^a (μg Cd g creatinine^-1).

aU-Cd is natural-log transformed b Percent change for creatinine-adj. U-Cd for a one unit increase of each independent variable was calculated as (eβ-1)*100 cR2 adjusted by degrees of freedom. Parameter estimates are listed for the factors selected by the procedure for inclusion in each model (p value cut-off = 0.2).