Hypokinesia (no / yes) All children (N=500) All boys (N=267) All girls (N=233) T-value Sig.   (2-tailed) of t-value T-value    Sig.   (2-tailed) of t-value T-value    Sig.   (2-tailed) of t-value Mercury 1.562 0.119 2.089 0.038 0.171 0.867 HCB -0.648 0.517 -0.403 0.687 -0.518 0.605 b-HCH 0.014 0.989 -1.037 0.301 1.229 0.220 Musk xylene -0.441 0.659 -0.683 0.524 0.022 0.983 PCB-118 -2.562 0.017 -0.975 0.330 -2.886 0.012 PCB-153 -2.436 0.022 -0.875 0.382 -2.430 0.031 PCB-105 -2.422 0.023 -1.024 0.307 -2.133 0.055 PCB-138 -2.389 0.025 -0.879 0.380 -2.484 0.029 PCB-156 -2.088 0.047 -0.756 0.450 -1.975 0.069 PCB-180 -2.422 0.023 -0.806 0.421 -2.615 0.021 SPCB -2.461 0.021 -0.868 0.386 -2.562 0.024 Sum of three mono-ortho PCBs (105+118+156) -2.472 0.021 -0.946 0.345 -2.659 0.019 4,4'-DDE -1.726 0.085 -0.620 0.536 -1.840 0.067 4,4'-DDT -2.754 0.011 -1.084 0.279 -2.450 0.031 Trans-nonachlor -3.171 0.004 -1.669 0.120 -2.956 0.011 * : All exposure variable were tested as log10-transformed values