Ann M Vuong1, Kimberly Yolton2, Changchun Xie3, Glenys M Webster4, Andreas Sjödin5, Joseph M Braun6, Kim N Dietrich1, Bruce P Lanphear4, Aimin Chen7. 1. Division of Epidemiology, Department of Environmental Health, University of Cincinnati College of Medicine, Cincinnati, OH, USA. 2. Division of General and Community Pediatrics, Department of Pediatrics, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA. 3. Division of Biostatistics and Bioinformatics, Department of Environmental Health, University of Cincinnati College of Medicine, Cincinnati, OH, USA. 4. BC Children's Hospital Research Institute and Faculty of Health Sciences, Simon Fraser University, Vancouver, British Columbia, Canada. 5. Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA, USA. 6. Department of Epidemiology, Brown University School of Public Health, Providence, RI, USA. 7. Division of Epidemiology, Department of Environmental Health, University of Cincinnati College of Medicine, Cincinnati, OH, USA. Electronic address: aimin.chen@uc.edu.
Abstract
BACKGROUND: Prenatal polybrominated diphenyl ether (PBDE) exposure has been associated with decrements in IQ and increased attention deficit/hyperactivity disorder related behaviors in children; however, data are limited for the role of postnatal exposures. OBJECTIVES: We investigated the association between a series of childhood PBDE concentrations and Full-Scale Intelligence Quotient (FSIQ) and externalizing problems at 8 years. METHODS: We used data from 208 children in the Health Outcomes and Measures of the Environment (HOME) Study, a prospective pregnancy and birth cohort. Child serum PBDEs were measured at 1, 2, 3, 5, and 8 years; missing serum PBDE concentrations were estimated via multiple imputation. The Wechsler Intelligence Scales for Children-IV and the Behavior Assessment System for Children-2 was used to assess intelligence and externalizing behavior, respectively, in children at 8 years. We used multiple informant models to estimate associations between repeated lipid-adjusted PBDEs and child neurobehavior and to test for windows of susceptibility. RESULTS: Postnatal exposure to PBDE congeners (- 28, - 47, - 99, - 100, and - 153) at multiple ages was inversely associated with FSIQ at 8 years. For instance, a 10-fold increase in BDE-153 concentrations at 2, 3, 5, and 8 years were all related to lower FSIQ at age 8 (β for 3 years: - 7.7-points, 95% CI - 12.5, - 2.9; β for 8 years: - 5.6-points, 95% CI - 10.8, - 0.4). Multiple PBDE congeners at 8 years were associated with increased hyperactivity and aggressive behaviors at 8 years. CONCLUSIONS: Postnatal PBDE exposure was associated with decrements in FSIQ and increases in hyperactivity and aggressive behaviors.
BACKGROUND: Prenatal polybrominated diphenyl ether (PBDE) exposure has been associated with decrements in IQ and increased attention deficit/hyperactivity disorder related behaviors in children; however, data are limited for the role of postnatal exposures. OBJECTIVES: We investigated the association between a series of childhood PBDE concentrations and Full-Scale Intelligence Quotient (FSIQ) and externalizing problems at 8 years. METHODS: We used data from 208 children in the Health Outcomes and Measures of the Environment (HOME) Study, a prospective pregnancy and birth cohort. Child serum PBDEs were measured at 1, 2, 3, 5, and 8 years; missing serum PBDE concentrations were estimated via multiple imputation. The Wechsler Intelligence Scales for Children-IV and the Behavior Assessment System for Children-2 was used to assess intelligence and externalizing behavior, respectively, in children at 8 years. We used multiple informant models to estimate associations between repeated lipid-adjusted PBDEs and child neurobehavior and to test for windows of susceptibility. RESULTS: Postnatal exposure to PBDE congeners (- 28, - 47, - 99, - 100, and - 153) at multiple ages was inversely associated with FSIQ at 8 years. For instance, a 10-fold increase in BDE-153 concentrations at 2, 3, 5, and 8 years were all related to lower FSIQ at age 8 (β for 3 years: - 7.7-points, 95% CI - 12.5, - 2.9; β for 8 years: - 5.6-points, 95% CI - 10.8, - 0.4). Multiple PBDE congeners at 8 years were associated with increased hyperactivity and aggressive behaviors at 8 years. CONCLUSIONS: Postnatal PBDE exposure was associated with decrements in FSIQ and increases in hyperactivity and aggressive behaviors.
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