Serum TCDD and TEQ concentrations among Seveso women, 20 years afte. The explosion

The Seveso Women's Health Study (SWHS) is a historical cohort study o. The female population residing near Seveso, Italy, on 10 July 1976, when a chemical explosion resulted i. The highest known residential exposure to 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD). Individual TCDD concentration was measured in serum collected nea. The time o. The explosion, and in 1996, we collected adequate blood for TCDD and total dioxin toxic equivalent (TEQ) measurement. Polychlorinated dibenzo-p-dioxins, dibenzofurans, and biphenyls were measured in 1996 serum for a sample (n=225, 23%) o. The SWHS cohort and WHO 2005 TEQs were calculated. We examined characteristics that predict 1996 TCDD concentrations and estimated TCDD elimination half-life ove. The 20-year period sinc. The explosion. Median lipid-adjusted TCDD and total TEQ concentrations in 1996 serum were 7.3 and 26.2 p.p.t., respectively. Initial 1976 TCDD and age at explosion wer. The strongest predictors of 1996 TCDD. The TCDD elimination half-life was 7.1 years for women older than 10 years in 1976, but was shorter in those who were younger. Twenty years afte. The explosion, TCDD concentrations in this SWHS sample. The majority of who were children in 1976, remain elevated relative to background. These data add t. The limited data available on TCDD elimination half-life in children.