Skip Navigation

Publication Detail

Title: Effect of Residential Lead-Hazard Interventions on Childhood Blood Lead Concentrations and Neurobehavioral Outcomes: A Randomized Clinical Trial.

Authors: Braun, Joseph M; Hornung, Richard; Chen, Aimin; Dietrich, Kim N; Jacobs, David E; Jones, Robert; Khoury, Jane C; Liddy-Hicks, Stacey; Morgan, Samantha; Vanderbeek, Suzette Baez; Xu, Yingying; Yolton, Kimberly; Lanphear, Bruce P

Published In JAMA Pediatr, (2018 Oct 01)

Abstract: Childhood lead exposure is associated with neurobehavioral deficits. The effect of a residential lead hazard intervention on blood lead concentrations and neurobehavioral development remains unknown.To determine whether a comprehensive residential lead-exposure reduction intervention completed during pregnancy could decrease residential dust lead loadings, prevent elevated blood lead concentrations, and improve childhood neurobehavioral outcomes.This longitudinal, community-based randomized clinical trial of pregnant women and their children, the Health Outcomes and Measures of the Environment (HOME) Study, was conducted between March 1, 2003, and January 31, 2006. Pregnant women attending 1 of 9 prenatal care clinics affiliated with 3 hospitals in the Cincinnati, Ohio, metropolitan area were recruited. Of the 1263 eligible women, 468 (37.0%) agreed to participate and 355 women (75.8%) were randomized in this intention-to-treat analysis. Participants were randomly assigned to receive 1 of 2 interventions designed to reduce residential lead or injury hazards. Follow-up on children took place at 1, 2, 3, 4, 5, and 8 years of age. Data analysis was performed from September 2, 2017, to May 6, 2018.Residential dust lead loadings were measured at baseline and when children were 1 and 2 years of age. At 1, 2, 3, 4, 5, and 8 years of age, the children's blood lead concentrations as well as behavior, cognition, and executive functions were assessed.Of the 355 women randomized, 174 (49.0%) were assigned to the intervention group (mean [SD] age at delivery, 30.1 (5.5) years; 119 [68.3%] self-identified as non-Hispanic white) and 181 (50.9%) to the control group (mean [SD] age at delivery, 29.2 [5.7] years; 123 [67.9%] self-identified as non-Hispanic white). The intervention reduced the dust lead loadings for the floor (24%; 95% CI, -43% to 1%), windowsill (40%; 95% CI, -60% to -11%), and window trough (47%; 95% CI, -68% to -10%) surfaces. The intervention did not statistically significantly reduce childhood blood lead concentrations (-6%; 95% CI, -17% to 6%; P = .29). Neurobehavioral test scores were not statistically different between children in the intervention group than those in the control group except for a reduction in anxiety scores in the intervention group (β = -1.6; 95% CI, -3.2 to -0.1; P = .04).Residential lead exposures, as well as blood lead concentrations in non-Hispanic black children, were reduced through a comprehensive lead-hazard intervention without elevating the lead body burden. However, this decrease did not result in substantive neurobehavioral improvements in children.ClinicalTrials.gov identifier: NCT00129324.

PubMed ID: 30178064 Exiting the NIEHS site

MeSH Terms: Adult; Child; Child, Preschool; Developmental Disabilities/epidemiology; Developmental Disabilities/etiology; Developmental Disabilities/prevention & control*; Dust/prevention & control*; Environmental Exposure/prevention & control*; Female; Follow-Up Studies; Housing; Humans; Incidence; Infant; Lead Poisoning/blood; Lead Poisoning/epidemiology; Lead Poisoning/prevention & control*; Lead/blood*; Male; Pregnancy; Prenatal Care/methods*; Primary Prevention/methods*; Retrospective Studies; United States/epidemiology

Back
to Top
Last Reviewed: October 02, 2024