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dc.contributor.authorBudtz-Jørgensen, Esben
dc.contributor.authorGrandjean, Philippe
dc.contributor.authorWeihe, Pal
dc.date.accessioned2010-11-12T16:03:07Z
dc.date.issued2006
dc.identifier.citationBudtz-Jorgensen, Esben, Philippe Grandjean, and Pal Weihe. 2007. Separation of Risks and Benefits of Seafood Intake. Environmental Health Perspectives 115(3): 323-327.en_US
dc.identifier.issn0091-6765en_US
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:4553350
dc.description.abstractBackground: Fish and seafood provide important nutrients but may also contain toxic contaminants, such as methylmercury. Advisories against pollutants may therefore conflict with dietary recommendations. In resolving this conundrum, most epidemiologic studies provide little guidance because they address either nutrient benefits or mercury toxicity, not both. Objectives: Impact on the same health outcomes by two exposures originating from the same food source provides a classical example of confounding. To explore the extent of this bias, we applied structural equation modeling to data from a prospective study of developmental methylmercury neurotoxicity in the Faroe Islands. Results: Adjustment for the benefits conferred by maternal fish intake during pregnancy resulted in an increased effect of the prenatal methylmercury exposure, as compared with the unadjusted results. The dietary questionnaire response is likely to be an imprecise proxy for the transfer of seafood nutrients to the fetus, and this imprecision may bias the confounder-adjusted mercury effect estimate. We explored the magnitude of this bias in sensitivity analysis assuming a range of error variances. At realistic imprecision levels, mercury-associated deficits increased by up to 2-fold when compared with the unadjusted effects. Conclusions: These results suggest that uncontrolled confounding from a beneficial parameter, and imprecision of this confounder, may cause substantial underestimation of the effects of a toxic exposure. The adverse effects of methylmercury exposure from fish and seafood are therefore likely to be underestimated by unadjusted results from observational studies, and the extent of this bias will be study dependent.en_US
dc.language.isoen_USen_US
dc.publisherNational Institute of Environmental Health Sciencesen_US
dc.relation.isversionofdoi:10.1289/ehp.9738en_US
dc.relation.hasversionhttp://www.ncbi.nlm.nih.gov/pmc/articles/PMC1849938/pdf/en_US
dash.licenseLAA
dc.subjectconfounding factorsen_US
dc.subjectexposure assessmenten_US
dc.subjectfood contaminationen_US
dc.subjectmethylmercury compoundsen_US
dc.subjectprenatal exposure-delayed effectsen_US
dc.subjectseafooden_US
dc.titleSeparation of Risks and Benefits of Seafood Intakeen_US
dc.typeJournal Articleen_US
dc.description.versionVersion of Recorden_US
dc.relation.journalEnvironmental Health Perspectivesen_US
dash.depositing.authorGrandjean, Philippe
dc.date.available2010-11-12T16:03:07Z
dash.affiliation.otherSPH^Environmental+Occupational Medicine+Epien_US
dc.identifier.doi10.1289/ehp.9738*
dash.authorsorderedfalse
dash.contributor.affiliatedWeihe, Pal
dash.contributor.affiliatedGrandjean, Philippe


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