A Survey on the Relationship Between Blood Lead Level and Intelligent Quotient,Academic Learning Records Among School Age Children in Yinchuan City

<<宁夏医学院学报 >>2001年03期
ZHAO Hai-ping

    目的：了解银川市区学龄儿童血铅水平现状，探讨其与智商及学习成绩的关系。方法：选择银川市无铅污染源的老城区3所小学共 324名7～12岁儿童进行血铅水平测定和智力、学习成绩调查。结果：儿童血铅水平范围0.19～1.00μmol/L，无性别差异。血铅值＞0.483μmol/L的比例为63%。不同血铅水平与智商及学习成绩未见明显相关。结论：在本研究的铅暴露范围内，铅对儿童智力的影响不明显，其损害作用可能被其它因素所掩盖。

Objective:To estimate blood lead level and to explore the relationship between blood lead level and intelligent Quotient(IO),academic l earning records among the children aged 7-12 years in Yinchuan.Methods:the blood lead level,intelligence and academic achievement of 324 children in three primary schools located at non-lead-polluted areas in Yinchuan were estim ated chemically or by using surveying scale table of intelligence respectively.Results:the range of blood lead level for children was 0.19-1.00μmol/L,median 0.56 μmol/L and showed no significant difference between boys an d girls,and the blood lead in 198(63%) children were higher than 0.483 μmol/L.N o significant correllation between the blood lead level and academic intelligenc e was found.Conclusion:The adverse effects induced possibly by high lead level in blood on intelligence is not prominent,implying that other factors which antagonize the hazardous action of blood lead on nerve cells might be act ively involved in the detailed mechanism.