What type of study is this?

This is a Systematic Review study.

What question did this study set out to answer?

To quantify the relationship between children's IQ and their body burden of lead.

March 22, 2026PEDIATRICS

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Systematic review reveals significant association of blood lead with IQ in children, highlighting public health policy implications.

To quantify the relationship between children's IQ and their body burden of lead.
Systematic review of 26 epidemiological studies since 1979
Included prospective studies of birth cohorts
Cross sectional studies of blood lead and tooth lead
Neonatal lead exposure doesn't affect IQ in the general population
Blood and tooth lead measures show a weak inverse association with IQ
Doubling body lead burden linked to a loss of 1-2 IQ points

J. F. L. (1995) studied this question.

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