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Neuropsychological studies in children with elevated tooth-lead concentrations. I. Pilot study
International Archives of Occupational and Environmental Health
|January 1, 1982
Summary
Childhood lead exposure, measured by tooth-lead concentrations (PbT), may be linked to subtle neuropsychological impairments. This pilot study found lower perceptual-motor skills and a slight IQ reduction in children with elevated PbT.
Area of Science:
- Environmental Health
- Neuropsychology
- Pediatrics
Background:
- Tooth-lead concentrations (PbT) offer a retrospective measure of cumulative childhood lead intake, unlike blood-lead (PbB).
- Previous research suggests potential links between lead exposure and adverse health outcomes in children.
Purpose of the Study:
- To investigate the association between elevated tooth-lead concentrations and neuropsychological performance in school-aged children.
- To assess intellectual performance, perceptual-motor integration, and gross motor coordination in relation to cumulative lead exposure.
Main Methods:
- Selected 52 school-aged children from Duisburg (FRG) into low (n=26) and elevated (n=26) PbT groups based on shed incisor teeth analysis.
- Matched groups for age, sex, and paternal occupation, then administered the German WISC, GFT, DCS, Benton-Test, and KTK under double-blind conditions.
Main Results:
- Children with elevated PbT showed significantly greater errors on the GFT and lower success rates on the DCS (P < 0.05).
- A near-significant reduction of 5-7 IQ points was observed in the elevated PbT group (P < 0.1).
- Perinatal risk factors were slightly more prevalent in the lead-exposed group.
Conclusions:
- This pilot study suggests a potential association between childhood lead exposure and neuropsychological deficits, particularly in perceptual-motor skills.
- The observed effects were subtle and partially confirmed, necessitating further research due to potential confounding factors like perinatal risks.