Age a) Region b) East=1, West=2 Plasma n-3/n-6 c) Smoking d) Beta HCH R square =0.76 0.39     p<0.0001 -0.42         0.000 0.31       <0.0001 0.13       0.06 ns Chlordanes R square =0.69 0.41     p<0.0001 -0.14        ns 0.43      <0.0001 0.26        0.002 DDT (sum) R square =0.63 0.34     p<0.001 -0.11        ns 0.49      <0.0001 0.27        0.002 Hexachlorbenz. R square =0.60 0.46     p<0.0001 -0.05         ns 0.31        0.002 0.15        0.09 ns Mirex R square =0.57 0.43     p<0.0001 -0.17       0.08 ns 0.37       <0.0001 0.15        ns PCB (sum) R square =0.80 0.34     p<0.0001 -0.50        0.000 0.37       <0.0001 0.21        0.002 Toxaph. (sum) R square =0.62 0.33     p=0.004 -0.25       0.017 0.40       <0.0001 0.22        0.02 a)    adjusted for alcohol, smoking, plasma lipids, plasma n-3/n-6 and region.   b)   adjusted for age, alcohol,smoking, plasma lipids, plasma n-3/n-6   c)    adjusted for age, alcohol, plasma lipids, region, and smoking   d)   adjusted for age, alcohol, plasma lipids, plasma n-3/n-6, and region