1. Association between the pregnancy exposome and fetal growth.
- Author
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Agier, Lydiane, Basagaña, Xavier, Hernandez-Ferrer, Carles, Maitre, Léa, Uria, Ibon Tamayo, Urquiza, Jose, Andrusaityte, Sandra, Casas, Maribel, Castro, Montserrat de, Cequier, Enrique, Chatzi, Leda, Donaire-Gonzalez, David, Giorgis-Allemand, Lise, Gonzalez, Juan R, Grazuleviciene, Regina, Gützkow, Kristine B, Haug, Line S, Sakhi, Amrit K, McEachan, Rosemary R C, and Meltzer, Helle M
- Subjects
FETAL development ,ENVIRONMENTAL exposure ,POLLUTANTS ,BIRTH weight ,FETAL growth disorders ,PARTICULATE matter ,LEAD toxicology ,MATERNAL exposure ,RESEARCH ,RESEARCH methodology ,MEDICAL cooperation ,EVALUATION research ,COMPARATIVE studies ,RESEARCH funding ,LONGITUDINAL method - Abstract
Background: Several environmental contaminants were shown to possibly influence fetal growth, generally from single exposure family studies, which are prone to publication bias and confounding by co-exposures. The exposome paradigm offers perspectives to avoid selective reporting of findings and to control for confounding by co-exposures. We aimed to characterize associations of fetal growth with the pregnancy chemical and external exposomes.Methods: Within the Human Early-Life Exposome project, 131 prenatal exposures were assessed using biomarkers and environmental models in 1287 mother-child pairs from six European cohorts. We investigated their associations with fetal growth using a deletion-substitution-addition (DSA) algorithm considering all exposures simultaneously, and an exposome-wide association study (ExWAS) considering each exposure independently. We corrected for exposure measurement error and tested for exposure-exposure and sex-exposure interactions.Results: The DSA model identified lead blood level, which was associated with a 97 g birth weight decrease for each doubling in lead concentration. No exposure passed the multiple testing-corrected significance threshold of ExWAS; without multiple testing correction, this model was in favour of negative associations of lead, fine particulate matter concentration and absorbance with birth weight, and of a positive sex-specific association of parabens with birth weight in boys. No two-way interaction between exposure variables was identified.Conclusions: This first large-scale exposome study of fetal growth simultaneously considered >100 environmental exposures. Compared with single exposure studies, our approach allowed making all tests (usually reported in successive publications) explicit. Lead exposure is still a health concern in Europe and parabens health effects warrant further investigation. [ABSTRACT FROM AUTHOR]- Published
- 2020
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