环境铅接触对儿童智力与行为影响的调查

Effect of Evironment Lead Exposure on chndren's Intelligence and Behaviour

对广州市区内无铅污染源的三所小学２５９名９～１１岁儿童进行血铅水平测试。并按血铅水平（≤１．２１μｍｏｌ／Ｌ和＞１．２１ｕｍｏｌ／Ｌ）将儿童分为两组比较其智商（ＩＱ）与行为，结果儿童血铅平均水平为０．７９ｕｍｏｌ／Ｌ。两组ＩＱ分别为１０４．７和９６．９，高铅组儿童ＩＱ、课堂注意力较低铅组低，说明在本次调查的血铅范围内，铅对儿童智商存在一定影响，井首先表现为抽象推理能力降低，儿童课堂注意力有随血铅增高而降低的趋势。在控制影响儿童智力发育的有关因素后，则未发现儿童ＩＱ与血铅有明显相关。

The lead level and intelligence quotient (IQ) were measured in 259 children aged 9 to 11 years old from three primary schools without lead pollution resources in Guangzhou. The results showed that mean blood lead level of the children was 0. 79ymol/L.The children were divided into two groups:the low -lead exposed group (LE) (PbB≤1.21μmol/L) and the high-lead exposed group (HE)(pbB >1.21μmol/L)for assessment of the association between to and body burden. It is found that the LE group was less to scores and attention than HE group- The confounding factors of to for children were used as continous measurements in multiple regression.It is indicated that there is no significant correlation between the blood lead level and to of children.