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KMID : 1034820100060010019
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Molecular & Cellular Toxicology
2010 Volume.6 No. 1 p.19 ~ p.23
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Effects of blood lead concentration on intelligence and personality in school children
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Kim Dae-Seon
Lee Eun-Hee
Yu Seung-Do
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Abstract
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This study was conducted to evaluate the effects of lead concentration in the blood on intelligence and personality in school children in Korea. This study was designed as a cross sectional study. The Korean Intelligence Test-Primary was administered to the 302 school age children (154 3rd-grade and 155 6th-grade) of three areas, urban, fishery, and agricultural area, Korea. Blood lead (Pb-B) was measured by means of atomic absorption spectroscopy equipped with graphite furnace atomizer. Geometric means of Pb-B for boys and girls were 2.79±1.58㎍/dL and 2.54±1.51㎍/dL, respectively. No children exceeded Pb-B of 10㎍/dL that is the recommended level of Pb-B in children by CDC, U.S.A. When the subjects were classified by median into two groups, upper and lower Pb-B groups, the IQ of upper and lower groups were 106.4±13.7 and 110.0±14.9 respectively. IQ score of upper group was lowered about 4 points than that of lower group. We founded that hyperactivity and autism score of Pb-B groups was higher than that of lower group. These results are coincident with the large-scale study results developed countries that chronic exposure to lead may reduce the intelligence of child. This study may provide the first suggestive evidence that Pb-B has an impact on childhood intelligence and personality in Korean children. It is necessary to consider the effects of other important factors, such as parental intelligence in the next study.
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KEYWORD
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Blood lead concentration, Children, Intelligence, Personality
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