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Guidelines for the Identification and Management of Lead Exposure

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) OutcomeMeasuredMeanAssociation <strong>of</strong>(st<strong>and</strong>ardprenatal <strong>and</strong> Maternaldeviation [SD]) Number <strong>of</strong> criminalchildhood blood prenatal Increased arrest rates associatedCohort BLL = 8.3 (3.8); arrests since 19-242008 lead concentrations Cincinnati, OH 250 BLL at 1st with prenatal BLL, relative riskstudy Median 7.8 turning 18 years yearswith criminal arrests or early 2nd (RR) = 1.40 (95% CI = 1.07 – 1.85).(5th to 95th <strong>of</strong> agein early adulthood trimesterpercentile(Wright et al. 2008)2.9–16).Plasma leadmean (SD):1st trimesterSingle-trimester models <strong>of</strong> MDIFetal lead exposure scores suggested a negative0.016 (0.014),at each stage <strong>of</strong> relationship between prenatalMaternal N = 119; 2nd Bayley Mentalpregnancy as a Mexico City, Cohort lead <strong>and</strong> MDI at 24 months2006 146 prenatal trimester Development Index 24 monthspredictor <strong>of</strong> infant Mexico study adjusting <strong>for</strong> covariates. Maternalplasma lead 0.014 (0.011), (MDI)mental development plasma lead in 1st trimester mostN = 136; 3rd(Hu et al. 2006) strongly associated with MDI (β =trimester 0.016–4.13, p = 0.03)(0.024), N =132BLL mean (SD):1st trimesterSingle-trimester models <strong>of</strong> MDI7.1 (5.1), NFetal lead exposure scores suggested a negative= 119; 2ndat each stage <strong>of</strong> relationship between prenatalMaternal trimester 6.1pregnancy as a Mexico City, Cohort lead <strong>and</strong> MDI at 24 months2006 146 prenatal (3.2), N = 136; Bayley MDI 24 monthspredictor <strong>of</strong> infant Mexico study adjusting <strong>for</strong> covariates. MaternalBLL 3rd trimestermental development blood lead in 1st trimester most6.9 (4.2), N =(Hu et al. 2006) strongly associated with MDI (β =132; delivery–3.77, p = 0.03).7.3 (4.3), N =111Fetal lead exposure Umbilical cord blood lead wasat each stage <strong>of</strong> Umbilical cord not statistically significantlypregnancy as a Mexico City, Cohort Umbilical lead (mean 6.2 associated with MDI (β = –0.35,2006 146 Bayley MDI 24 monthspredictor <strong>of</strong> infant Mexico study cord BLL SD 3.9) (<strong>for</strong> N = p = 0.88), but this exposuremental development 83 only) measure was only available on a(Hu et al. 2006) subset <strong>of</strong> subjects.14

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