R R² Adjusted R²     Standardized error of the estimate For all children seen by ST 0.522 0.273 0.228 3.00 For all boys seen by ST* 0.752 0.566 0.514 2.39 Unstandardized coefficients Standardized coefficients Significance Collinearity statistic (tolerance) B Standard error Beta   (N=233)     (N=131) Constant   56.84 7.444 <0.001 <0.001 Corrected age at NOS (days) -0.102 0.037    -0.172 0.007 0.002 0.949 Interval to last meal (min)   0.012 0.005     0.163 0.009 0.042 0.977 Environmental temperature (°C) -0.391 0.276    -0.088 0.159 0.001 0.970 Stability of states   (no / yes)   5.082 1.404     0.230 <0.001 <0.001 0.935 Level of higher one of parents´ profession/ occupation (low/ high) -0.877 0.447    -0.128 0.051 0.138 0.879 Weight gain during pregnancy (kg)* -0.038 0.040    -0.059 0.351 Not in model 0.944 Early abortions   (no / yes) -0.797 0.501    -0.102 0.114 0.051 0.909 Log10 of MeHg   1.125 0.595     0.140 0.060 0.002 0.688 Log10 of HCB -3.155 2.179    -0.206 0.149 0.117 0.186 Log10 of PCB 105      -2.356     0.973    -0.286 0.016 0.001 0.269 Log10 of PCB 156       10.72     2.804     0.984 <0.001 <0.001 0.057 Log10 of PCB 180      -8.207    2.603    -0.787 0.002 0.007 0.059 Log10 of t- nonachlor*     --- ---        --- --- 0.312 --- * : Same model as for all children seen by B with trans-nonachlor instead of weight gain +