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Int J Environ Health Res. 2019 Jan 14:1-14. doi: 10.1080/09603123.2018.1560396. [Epub ahead of print]

Temporal trends of legacy and emerging persistent organic pollutants in inuit preschoolers from Northern Quebec (Canada).

Author information

1
a School of Nutrition, Faculty of Agriculture and Food Sciences , Laval University , Québec City , QC , Canada.
2
b Nutrition DG , Québec City , QC , Canada.
3
c Department of Family Medicine and Emergency Medicine , University of Sherbrooke , Longueuil , QC , Canada.
4
d Department of Agricultural, Food & Nutritional Sciences , University of Alberta , Edmonton , Alberta , Canada.
5
e Inuulitsivik Health and Social Services Centre , Puvirnituq , QC , Canada.
6
f Department of social and preventive medicine , Laval University and INSPQ , Québec City , QC , Canada.

Abstract

In this study, we report the temporal trends of persistent organic pollutants (POPs) in 181 preschool Inuit children from Nunavik and the influence of confounding factors on blood contaminant levels. From 2006 to 2010, no significant trends were detected in Σpolychlorinated biphenyls (ΣPCBs), Σorganochlorine pesticides (ΣOPs), Σtoxaphene, and Σper- and polyfluoroalkyl substances (ΣPFASs). On the contrary, significant downward trends ranging from 9.3% to 14.3% per year were found for polybrominated diphenyl ethers (PBDEs). Breastfeeding was significantly associated with increased levels of POPs. Age was positively and significantly related to ΣPCBs, ΣOPs and Σtoxaphene. Compared with girls, boys had significantly higher concentrations of ΣPBDEs, but lower concentrations of ΣPFASs. Weight-for-height or body mass index z-scores were negatively and significantly related to ΣPCBs and ΣOPs. Passive smoking was positively and significantly associated with ΣOPs and Σtoxaphene. In conclusion, continued efforts to reduce contaminant exposure are needed to protect children's health and development.

KEYWORDS:

Canada; Children; pollutants

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