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PubMed · 2722362

Lead, IQ and social class.

D Bellinger·A Leviton·C Waternaux
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Abstract

Social class (SC) conveys information about a child's potential lead exposure (PB) as well as other, independent determinants of cognition (IQ). Thus, depending on the way in which SC is handled in statistical analyses, the PB-IQ association may be either 'overadjusted' or 'underadjusted' for SC. Two assumptions that underlie the inclusion of SC in correlation/regression analyses of the PB-IQ relationship are: 1) SC is an interval scale and 2) the PB-IQ relationship is homogeneous in all social strata. Simulation analyses are presented to illustrate the impact that different values of the bivariate correlations PB-SC, IQ-SC, and PB-IQ have on the estimate of the PB-IQ adjusted for SC. Alternative approaches to addressing these issues are discussed.

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ChildEpidemiologic MethodsHumansIntelligenceLeadModels, TheoreticalSocial ClassStatistics as TopicJournal ArticleResearch Support, U.S. Gov't, P.H.S.

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D Bellinger, A Leviton, C Waternaux. 1989. Lead, IQ and social class.. https://doi.org/10.1093/ije%2F18.1.180

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