Journal
AMERICAN JOURNAL OF EPIDEMIOLOGY
Volume 175, Issue 5, Pages 451-465Publisher
OXFORD UNIV PRESS INC
DOI: 10.1093/aje/kwr328
Keywords
child development; fetal blood; fetal development; mercury; neurobehavioral manifestations; prenatal exposure delayed effects
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Funding
- Instituto de Salud Carlos III [Red INMA G03/176, CB06/02/0031]
- Spanish Ministry of Health [FIS-FEDER 03/1615, 04/1509, 04/1112, 04/1931, 05/1079, 05/1052, 06/1213, 07/0314, 09/02647, 04/1436, 08/1151]
- Conselleria de Sanitat Generalitat Valenciana, Generalitat de Catalunya [CIRIT 1999SGR 00241]
- Diputacion Foral de Guipuzcoa [DFG/004]
- Departamento de Sanidad y Consumo Gobierno Vasco [2005111093]
- European Union [FP6-2003-Food-3-A-016320]
- Fundacion Roger Torne
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Vulnerability of the central nervous system to mercury is increased during early development. This study aimed to evaluate whether cord blood total mercury levels may have a negative effect on both mental and psychomotor development in a maternal-birth cohort from moderate-high fish consumption areas. Study subjects were 1,683 child participants in the INMA (Environment and Childhood) Project from 4 areas of Spain between 2003 and 2010. Cord blood total mercury levels were analyzed by atomic absorption spectrometry. Infant neurodevelopment was assessed around age 14 months by the Bayley Scales of Infant Development. Sociodemographic, lifestyle, and dietary information was obtained by questionnaire during pregnancy. The geometric mean of total mercury levels was 8.4 mu g/L (95% confidence interval (CI): 8.1, 8.7). In multivariate analysis, a doubling in total mercury levels did not show an association withmental (beta = 0.1, 95% CI: -0.68, 0.88) or psychomotor (beta = -0.05, 95% CI: -0.79, 0.68) developmental delay; however, stratified findings by sex suggest a negative association between prenatal exposure to total mercury and psychomotor development among female infants (beta = -1.09, 95% CI: -2.21, 0.03), although follow-up is required to confirm these results.
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