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为探讨铅接触对儿童的影响,作者调查了由母亲报告的儿童行为。研究对象为201例于1989年2～6月由母亲陪送到巴尔的摩铅减少实施规划诊所或肯尼迪研究所铅中毒康复中心就诊的儿童,全部受试者均为非洲裔美国籍、年龄2～5岁。依据2次连续采集静脉血所测的血铅浓度,将受试者分为2组。血铅<150μg/L的123例为低接触组(行为检查前和检查时血铅均值分别为113±43和92±29μg/L),血铅≥150μg/L的78例为高接触组(行为检查前和检查时血铅均
To explore the impact of lead exposure on children, the authors investigated the behavior of children reported by their mothers. The subjects were 201 children accompanied by their mothers to Baltimore’s Lead Reduce Implementation Planning clinic or the Kennedy Institute for Lead Poisoning and Rehabilitation Center from February to June 1989. All subjects were African American nationals aged 2 to 5 years . According to two consecutive blood samples collected venous blood lead levels, the subjects were divided into two groups. 123 cases of blood lead <150μg / L were low-exposure group (blood lead mean 113 ± 43 and 92 ± 29μg / L before and after behavioral examination), and 78 patients with blood lead≥150μg / L were high-exposure group Pre-behavioral tests and examinations of blood lead are