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HERO ID
1510243
Reference Type
Journal Article
Title
Prenatal methylmercury, postnatal lead exposure, and evidence of attention deficit/hyperactivity disorder among Inuit children in Arctic Québec
Author(s)
Boucher, O; Jacobson, SW; Plusquellec, P; Dewailly, É; Ayotte, P; Forget-Dubois, N; Jacobson, JL; Muckle, G
Year
2012
Is Peer Reviewed?
Yes
Journal
Environmental Health Perspectives
ISSN:
0091-6765
EISSN:
1552-9924
Volume
120
Issue
10
Page Numbers
1456-1461
Language
English
PMID
23008274
DOI
10.1289/ehp.1204976
Web of Science Id
WOS:000309692600030
URL
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84867171107&doi=10.1289%2fehp.1204976&partnerID=40&md5=1a729cd05fe43c188b1f1ca6d4a800c0
Exit
Relationship(s)
has summary
2189847
[Behavioral issues in Inuit children exposed to mercury, PCBs and lead]
has comment/response
6574118
[Email to Dr. Krista Christensen regarding a request for study details on Boucher et al., 2012 and Boucher et al., 2014]
Abstract
BACKGROUND:
Prenatal exposure to methylmercury (MeHg) and polychlorinated biphenyls (PCBs) has been associated with impaired performance on attention tasks in previous studies, but the extent to which these cognitive deficits translate into behavioral problems in the classroom and attention deficit/hyperactivity disorder (ADHD) remains unknown. By contrast, lead (Pb) exposure in childhood has been associated with ADHD and disruptive behaviors in several studies.
OBJECTIVES:
In this study we examined the relation of developmental exposure to MeHg, PCBs, and Pb to behavioral problems at school age in Inuit children exposed through their traditional diet.
METHODS:
In a prospective longitudinal study conducted in the Canadian Arctic, exposure to contaminants was measured at birth and at school age. An assessment of child behavior (n = 279; mean age = 11.3 years) was obtained from the child's classroom teacher on the Teacher Report Form (TRF) from the Child Behavior Checklist, and the Disruptive Behavior Disorders Rating Scale (DBD).
RESULTS:
Cord blood mercury concentrations were associated with higher TRF symptom scores for attention problems and DBD scores consistent with ADHD. Current blood Pb concentrations were associated with higher TRF symptom scores for externalizing problems and with symptoms of ADHD (hyperactive-impulsive type) based on the DBD.
CONCLUSIONS:
To our knowledge, this study is the first to identify an association between prenatal MeHg and ADHD symptomatology in childhood and the first to replicate previously reported associations between low-level childhood Pb exposure and ADHD in a population exposed to Pb primarily from dietary sources.
Keywords
ADHD; attention; children; exposure; externalizing behavior; lead; mercury; methylmercury; polychlorinated biphenyls
Tags
IRIS
•
Methylmercury
Literature Search: Jan 1998 - March 2017
Food Studies
Human Data
PubMed
ToxNet
Web of Science
Text Review: October 2019
Included
•
PCBs
Hazard ID: Epidemiological evidence
Litsearches
Remaining
LitSearch August 2015
Pubmed
Toxline
WoS
•
PCBs Epi Hazard ID
Health Effects
Neurological
NAAQS
•
ISA - Lead (2024 Final Project Page)
Included in Peer Input Draft
Appendix 3 (Nervous System Effects)
Included in External Review Draft
Appendix 3 (Nervous System Effects)
Included in Final Draft
Appendix 3 (Nervous System Effects)
Title-Abstract Screening (SWIFT-AS) - Included
Title-Abstract Screening (SWIFT-AS) - Included
Full-Text Screening Included
Full-Text Screening Included
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