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Undernutrition and elevated blood lead levels: effects on psychomotor development among Jamaican children

J M Gardner1, S P Walker, S M Chang

  • 1Tropical Metabolism Research Unit, University of the West Indies, Mona, Kingston, Jamaica. jgardner@infochan.com

Public Health Nutrition
|August 10, 2000
PubMed

Insights

Children with poor nutrition exposed to lead experienced greater psychomotor deficits. This highlights the critical interaction between lead exposure and nutritional status in early childhood development.

Area of Science:

  • Environmental Health
  • Pediatric Development
  • Nutritional Science

Background:

  • Elevated blood lead levels are a known neurotoxin affecting children's development.
  • Nutritional status can influence a child's vulnerability to environmental toxins.
  • The interaction between lead exposure and nutrition on psychomotor development requires further investigation.

Purpose of the Study:

  • To investigate if nutritional status modifies the impact of elevated blood lead levels on children's psychomotor development.
  • To compare developmental quotients (DQs) in lead-exposed versus unexposed children across different nutritional strata.

Main Methods:

  • Cross-sectional study in Kingston, Jamaica, involving 111 children aged 3-6 years.
  • Measurements included anthropometry, blood lead levels, hemoglobin, and developmental quotients (DQs).
  • Social background and maternal factors were also assessed to control for confounding variables.

Main Results:

  • Lead-exposed children exhibited significantly higher blood lead levels and lower DQs compared to unexposed children.
  • The negative impact of lead exposure on DQs was substantially greater in undernourished children (deficit of 10.6 points) than in well-nourished children (deficit of 2 points).
  • Homes of exposed children generally had poorer facilities, indicating potential co-exposure to other environmental stressors.

Conclusions:

  • Undernourished children exposed to lead are at higher risk for significant psychomotor developmental deficits.
  • Nutritional status is a critical factor that can exacerbate the adverse effects of lead exposure on child development.
  • Public health interventions should consider nutritional support alongside lead abatement strategies for vulnerable populations.
Abstract

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