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Lead exposure and child behavior.

W G Sciarillo1, G Alexander, K P Farrell

  • 1Children's Medical Services, Department of Health and Mental Hygiene, Baltimore, Md.

American Journal of Public Health
|October 1, 1992
PubMed
Summary
This summary is machine-generated.

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High lead exposure in young children is linked to significant behavior problems. This study found elevated Total Behavior Problem Scores in children with high lead levels, even after accounting for maternal factors.

Area of Science:

  • Environmental Health
  • Pediatric Psychology
  • Toxicology

Background:

  • Lead exposure is a known neurotoxin, with cognitive effects well-documented.
  • Lead-associated behavioral problems in young children remain less understood and difficult to quantify.

Purpose of the Study:

  • To investigate the relationship between blood lead levels and behavioral problems in young African-American children.
  • To determine if lead exposure is associated with increased internalizing and externalizing behaviors.

Main Methods:

  • Utilized the Child Behavior Checklist (CBCL) and the Center for Epidemiologic Studies Depression Scale for 201 children aged 2-5 years.
  • Examined the association between blood lead levels and behavioral outcomes, controlling for maternal depressive symptomatology.

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Main Results:

  • Children with high lead exposure (≥15 µg/dL) exhibited significantly higher CBCL Total Behavior Problem Scores (TBPS), internalizing, and externalizing scores.
  • Regression analysis indicated a dose-response relationship: a .18-point TBPS increase per unit increase in lead, and a 5.1-point higher TBPS in the highly exposed group.
  • Highly exposed children were 2.7 times more likely to have a TBPS in the clinical range.

Conclusions:

  • This study provides further evidence of lead's detrimental impact on child behavior at contemporary exposure levels.
  • The use of standardized behavioral measures and controlling for maternal factors strengthens the findings.
  • Results highlight the need for continued vigilance and intervention regarding lead exposure in early childhood.