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Child Neuropsychol. 2003 Mar;9(1):22-34.

The relationship between blood lead, bone lead and child intelligence.

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  • 1Department of Psychiatry, College of Physicians and Surgeons, Columbia University, and New York State Pyschiatric Institute, New York City, 10032, USA. wassermg@child.cpmc.columbia.edu

Abstract

We report associations between serial measures of blood lead and intelligence in children age 10-12 years, half heavily exposed to lead from the prenatal period onward, and half relatively unexposed. For a subsample, we examine bone lead-IQ associations, comparing them with bone lead associations. Both blood and bone lead levels were associated with intelligence decrements, small relative to the contribution of social factors. For each doubling of Tib-Pb, Full Scale, Performance, and Verbal IQ decreased by an estimated 5.5, 6.2, and 4.1 points, respectively. Bone lead-IQ associations were stronger than those for blood lead, which nonetheless provide robust analogues. Current BPb, easy to obtain, provides a useful means for assessing Pb exposure/IQ associations.

PMID:
12815520
[PubMed - indexed for MEDLINE]
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