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Guidelines for the Identification and Management of Lead Exposure

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EstimateStudy Study <strong>of</strong> Prenatal <strong>Lead</strong> Levels Outcome Age atYear Study N ResultsSite Type <strong>Exposure</strong> (in µg/dL) Measure(s) OutcomeMeasuredBayley MDI <strong>and</strong> PDILow-level lead <strong>and</strong> modified KentMaternal BLL was statisticallyexposure in <strong>the</strong> Infant Developmentsignificantly associated withprenatal <strong>and</strong> early Maternal Mean 6.5, SD (KID) scale at 6 6 months;Prospective 6 month MDI, PDI, <strong>and</strong> KID in1987 preschool periods: Clevel<strong>and</strong>, OH 119-145 BLL (at 1.8, range 2.7­ months; Bayley 1, 2, <strong>and</strong> 3cohort study unadjusted analyses, but <strong>the</strong>seearly preschool delivery) 11.8 MDI at 1 year <strong>and</strong> yearsassociations were not significantdevelopment 2 years; Stan<strong>for</strong>daftercontrol <strong>for</strong> covariates.(Ernhart et al. 1987) Binet Intelligencescale at 3 yearsBayley MDI <strong>and</strong> PDILow-level lead<strong>and</strong> modified KIDexposure in <strong>the</strong>scale at 6 months; Umbilical cord BLL was notprenatal <strong>and</strong> early Mean 5.99, SD 6 months;Prospective Umbilical Bayley MDI at 1 statistically significantly1987 preschool periods: Clevel<strong>and</strong>, OH 109-127 2.11, range 1, 2, <strong>and</strong> 3cohort study cord BLL year <strong>and</strong> 2 years; associated with 6 month or laterearly preschool 2.8-14.7 yearsStan<strong>for</strong>d-Binet MDI, PDI, <strong>and</strong> KID.developmentIntelligence scale at(Ernhart et al. 1987)3 yearsAbbreviations: 95% CI: 95% confidence interval; BAER: brainstem auditory evoked response; BLL: blood lead level; BSID-II: Bayley Scales <strong>of</strong> Infant Development; delta-ALA: deltaaminolevulinicacid; FSIQ: full-scale IQ; FTII: Fagan Test <strong>of</strong> Infant Intelligence; GCI: general cognitive index; HPA: hypothalamic-pituitary-adrenal; KID: Kent Infant Development; K-TEA:Kaufman Test <strong>of</strong> Educational Achievement; MDI: mental development index; NBAS: Neonatal Behavioral Assessment Scale; OR: odds ratio; PDI: psychomotor development index; PIQ:per<strong>for</strong>mance IQ; RR: relative risk; SD: st<strong>and</strong>ard deviation; VIQ: verbal IQ; WISC-III IQ: Wechsler Intelligence Scale <strong>for</strong> Children-version III; WISC-R: Wechsler Intelligence Scale <strong>for</strong> Children-Revised; WPPSI: Wechsler Preschool <strong>and</strong> Primary Scale <strong>of</strong> Intelligence; WPPSI-R IQ: Wechsler Preschool <strong>and</strong> Primary Scale <strong>of</strong> Intelligence-Revised.26

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