Separating the effects of lead and social factors on IQ.
Separating the effects of lead and social factors on IQ.
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区分铅和社会因素对智商的影响。
DOI：
10.1016/0013-9351(85)90080-5
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发表时间：
1985
影响因子：
8.3
通讯作者：
Hicks,RE
中科院分区：
文献类型：
--
作者：
Schroeder,SR;Hawk,B;Otto,DA;Mushak,P;Hicks,RE
通过对北卡罗莱纳州社区卫生部门筛选的104名低社会经济地位黑人儿童的初步评价，在控制了社会经济地位、家庭环境和母亲智商等社会因素后，铅在6 ~ 59 μg/dl范围内对智商有显著影响。伴随变量主要为社会经济地位，社会经济地位与其他社会因素呈多元线性关系。五年后，当所有血铅水平低于30 μg/dl时，铅对智商的影响不再显著。母亲和儿童智商之间的相关性在铅含量较高的儿童中最初被抑制，当血铅水平下降时恢复到预期水平，而伴随的变量在5年期间保持稳定。
Initial evaluations of 104 low-socioeconomic status black children screened by the local community health departments in North Carolina showed significant effects of lead in the range 6–59 μg/dl on IQ after controlling for concomitant social factors, such as socioeconomic status, home environment, and maternal IQ. The main concomitant variable was socioeconomic status, which was multicolinear with other social factors. Five years later, when all blood lead levels were 30 μg/dl or less, lead effects on IQ were no longer significant. The correlation between maternal and child IQ, which had been suppressed initially in children with higher lead levels, returned to expected levels when decreases in blood lead level occurred, while concomitant variables remained stable over the 5-year period.