标题：Blood and hair mercury concentrations among Cree First Nations of Eeyou Istchee (Quebec, Canada): time trends, prenatal exposure and links to local fish consumption
摘要：Susannah Ripley a , Elizabeth Robinson *ab , Louise Johnson-Down c http://orcid.org/0000-0002-4426-7108 , Anne Andermann abd , Pierre Ayotte efg http://orcid.org/0000-0003-1970-7252 , Michel Lucas ef http://orcid.org/0000-0001-6629-5612 & Evert Nieboer ha Department of Epidemiology, Biostatistics and Occupational Health , McGill University , Montréal , Québec , Canada b Public Health Department , Cree Board of Health and Social Services of James Bay , Mistissini , Québec , Canada c School of Dietetics and Human Nutrition , McGill University, Sainte Anne de Bellevue , Québec , Canada d Department of Family Medicine , McGill University , Montréal , Québec , Canada e Department of Social & Preventive Medicine , Laval University , Québec , QC , Canada f Axe Santé des populations et pratiques optimales en santé , Centre de recherche du CHU de Québec - Université Laval , Québec , QC , Canada g Quebec Toxicology Centre , Institut National de Santé Publique du Québec , Québec , QC , Canada h Department of Biochemistry and Biomedical Sciences , McMaster University , Hamilton , ON , Canada CONTACT Elizabeth Robinson elr56789@gmail.com Department of Epidemiology, Biostatistics and Occupational Health , McGill University , 1020 Pine Avenue West, Montreal , Quebec H3A 1A2 , Canada To describe exposure to methylmercury among Cree, focusing on women of childbearing age, we used data from 2 studies. Multiple regression was employed to examine associations between blood and hair mercury concentrations and consumption of locally harvested fish. Approximately 9.9% of non-pregnant women aged 15–44 y and 3.9% of pregnant women required follow-up according to Health Canada’s blood mercury guidance value of 40 nmol/L. 8% of hair mercury observations in the non-pregnant women and 2.5% among pregnant women exceeded the equivalent threshold of 10 nmol/g. The geometric mean blood mercury concentration was 12.7 nmol/L in 1,429 persons aged 8 and over, and 17.7 nmol/L in adults aged 18 and older. The proportion of hair mercury concentrations greater than 12.5 nmol/g decreased in all age-sex groups when comparing the 2002–2009 data to published values for 1993–1994. Among women of childbearing age, local fish consumption was associated with increased blood and hair mercury concentrations. While over 90% of women of childbearing age in this population have acceptable levels of mercury, ongoing intake of mercury suggests that their consumption of fish with known high mercury content be minimised. Reducing consumption of fish known to be high in mercury content needs to be balanced with promoting ongoing connection to Cree culture and land-based activities that are also important determinants of health.
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