ArticleInternational journal of hygiene and environmental health2023
Gestational organophosphate ester exposure and preschool attention-deficit/hyperactivity disorder in the Norwegian Mother, Father, and Child cohort study.
Article in International journal of hygiene and environmental health, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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9 citing papers in PubMed, 20 citations in OpenAlex.
- Epigenome-wide association analysis of prenatal organophosphate ester flame retardant exposure in maternal blood implicates maternal immune and neuronal epigenetic alterations.Environment international · 2026Article
- Prenatal exposure to organophosphate ester flame retardants and child cognition: Findings from the environmental influences on child Health Outcomes cohort.Environmental pollution (Barking, Essex : 1987) · 2026Article
- Prenatal Persistent Exposure to Organophosphate Esters and Early Childhood Brain Development: A Longitudinal Analysis.Environment & health (Washington, D.C.) · 2025Article
- Prenatal exposure to organophosphate ester flame retardants and behavioral outcomes in early childhood in the Environmental influences on Child Health Outcomes (ECHO) cohort.Environment international · 2025Article
- Gestational exposure to organophosphate esters and autism spectrum disorder and other non-typical development in a cohort with elevated familial likelihood.Environmental research · 2024Article
- Gestational organophosphate esters (OPEs) and executive function in adolescence: The HOME Study.Environmental research · 2024Article
- Exposure to organophosphate esters and maternal-child health.Environmental research · 2024Review
- Association between urinary organophosphate ester metabolite exposure and thyroid disease risk among US adults: National Health and Nutrition Examination Survey 2011-2014.Frontiers in endocrinology · 2024Article
- Prenatal organophosphate ester exposure and executive function in Norwegian preschoolers.Environmental epidemiology (Philadelphia, Pa.) · 2023Article
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Authors and funding
16 authors at 5 institutions in 3 countries.
Funding
Abstract
backgroundAttention-deficit/hyperactivity-disorder (ADHD) is a leading neurodevelopmental disorder in children worldwide; however, few modifiable risk factors have been identified. Organophosphate esters (OPEs) are ubiquitous chemical compounds that are increasingly prevalent as a replacement for other regulated chemicals. Current research has linked OPEs to neurodevelopmental deficits. The purpose of this study was to assess gestational OPE exposure on clinically-assessed ADHD in children at age 3 years.
methodsIn this nested case-control study within the Norwegian Mother, Father, and Child Cohort study, we evaluated the impact of OPE exposure at 17 weeks' gestation on preschool-age ADHD. Between 2007 and 2011, 260 ADHD cases were identified using the Preschool Age Psychiatric Assessment and compared to a birth-year-stratified control group of 549 children. We categorized bis(2-butoxyethyl) phosphate (BBOEP) and bis(1,3-dichloro-2-propyl) phosphate (BDCIPP) as values < limit of detection (LOD) (BBOEP N = 386, BDCIPP N = 632), ≥LOD but < limit of quantification (LOQ) (BBOEP N = 413; BDCIPP N = 75), or above LOQ (BBOEP N = 70; BDCIPP N = 102). Diphenyl phosphate (DPhP) and di-n-butyl phosphate (DnBP) were categorized as quartiles and also modeled with a log10 linear term. We estimated multivariable adjusted odds ratios (ORs) using logistic regression and examined modification by sex using an augmented product term approach.
resultsMothers in the 3rd DnBP quartile had 1.71 times the odds of having a child with ADHD compared to the 1st quartile (95%CI: 1.13, 2.58); a similar trend was observed for log10 DnBP and ADHD. Mothers with BDCIPP ≥ LOD but < LOQ had 1.39 times the odds of having a child with ADHD compared to those with BDCIPP < LOD (95%CI: 0.83, 2.31). Girls had lower odds of ADHD with increasing BBOEP exposure (log10 OR: 0.55 (95%CI: 0.37, 0.93), however boys had a weakly increased odds (log10 OR: 1.25 (95%CI: 0.74, 2.11) p-interaction = 0.01].
conclusionsWe found modest increased odds of preschool ADHD with higher DnBP and BDCIPP exposure.
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