Overview of data analyses strategy. Robust linear regression models were adjusted for age, race, sex, smoking status, and percentages for six different white blood cell types. Five different exposure groupings were used in regression: the sum of all 28 compounds (ΣDioxins), polychlorinated dibenzodioxins (PCDDs), polychlorinated dibenzofurans (PCDFs), non-ortho substituted PCBs (cPCBs), and mono-ortho substituted PCBs (mPCBs) Exposure measures were lipid-substituted toxic equivalencies (TEQs).