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Dietary exposure to dioxins and PCBs in a large cohort of pregnant women: results from the Norwegian Mother and Child Cohort Study (MoBa).
Environ Int. 2013 Sep;59:398-407
Publication Type
Ida H Caspersen
Helle K Knutsen
Anne Lise Brantsæter
Margaretha Haugen
Jan Alexander
Helle Margrete Meltzer
Helen E Kvalem
Author Affiliation
Norwegian Institute of Public Health, Oslo, Norway.
Environ Int. 2013 Sep;59:398-407
Publication Type
Body Burden
Cohort Studies
Diet - adverse effects
Dioxins - administration & dosage - blood
Environmental Exposure
Environmental Pollutants - administration & dosage - analysis - blood
Fish Products - adverse effects - analysis
Food Contamination
Polychlorinated Biphenyls - administration & dosage - blood
Tetrachlorodibenzodioxin - blood
Young Adult
Exposure to dioxins and polychlorinated biphenyls (PCBs) during pregnancy and breastfeeding may result in adverse health effects in children. Prenatal exposure is determined by the concentrations of dioxins and PCBs in maternal blood, which reflect the body burden obtained by long term dietary exposure. The aims of this study were (1) to describe dietary exposure and important dietary sources to dioxins and PCBs in a large group of pregnant women and (2) to identify maternal characteristics associated with high dietary exposure to dioxins and PCBs. Dietary exposure to dioxins (sum of toxic equivalents (TEQs) from dioxin-like (dl) compounds) and PCB-153 in 83,524 pregnant women (gestational weeks 17-22) who participated in the Norwegian Mother and Child Cohort Study (MoBa) during the years 2002-2009 was calculated based on a food frequency questionnaire (FFQ) and a database of dioxin and PCB concentrations in Norwegian food. The median (interquartile range, IQR) intake of PCB-153 (marker of ndl-PCBs) was 0.81 (0.77) ng/kg bw/day. For dioxins and dioxin-like PCBs, the median (IQR) intake was 0.56 (0.37) pg TEQ/kg bw/day. Moreover, 2.3% of the participants had intakes exceeding the tolerable weekly intake (TWI) of 14pg TEQ/kg bw/week. Multiple regression analysis showed that dietary exposure was positively associated with maternal age, maternal education, weight gain during pregnancy, being a student, and alcohol consumption during pregnancy and negatively associated with pre-pregnancy BMI and smoking. A high dietary exposure to PCB-153 or dl-compounds (TEQ) was mainly explained by the consumption of seagull eggs and/or pate with fish liver and roe. Women who according to Norwegian recommendations avoid these food items generally do not have dietary exposure above the tolerable intake of dioxins and dl-PCBs.
PubMed ID
23911340 View in PubMed
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