摘要
为探讨交通铅污染对儿童智商的影响，选取交通要道附近学校在校五年（级）学生为观察组，取教学条件相近，非交通要道的同年（级）学生作对照．检测校园大气铅含量、学生血铅负荷、智商和影响因素．结果表明，观察组校园大气铅含量超过国家标准１．７倍，学生血铅负荷≥１．４μｍｏｌ／Ｌ，智商明显低于对照组；对照组校园大气铅在国家标准范围内，学生血铅平均值为０．９５μｍｏｌ／Ｌ。通过逐步回归分析筛选出血铅负荷等９个影响学生智商的因素，应用线性模型方法控制混杂因素后，仍显示血铅对智商的影响。
To search the effect of traffic lead exposure on pupils'Intelligence Quotient(IQ),103 pupils near an urban motorway in Fuzhou were selected as the observed group.Lead levels of campus atmosphere,Blood-Lead-Bunden(PbB) of the fifth grade pupils and their IQ and affecting factors were investigated.106 pupils from far urban motorway and of the similar educative condition were selected as the control group. Results showed that Pb level of campuse atmosphere was surpassed 1.7 fold of the National standard limit,and pupils'PbB increased over 1.4μmol/L and IQ decreased significantly in the observed group.By means of stepwise regression analysis,the factors to affect pupils'IQ were factors of PbB and so on synergistic action on IQ.After applying linear model to control confounding variables the effect of PbB on pupils'IQ presented also.
关键词
铅污染
小学生
血铅负荷
智商
Pb pollution Pupils Blood-Lead-Burden Intelligence-Quotient .
