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Table 1 Estimated IQ and economic loss attributable to blood lead levels above 20 μg/L: Estimates per 100,000 individuals in FLEHSI, FLEHSII, and FLEHSIII as assessed by the linear-log and the linear-interval dose response relationship

From: Intelligence gain and social cost savings attributable to environmental lead exposure reduction strategies since the year 2000 in Flanders, Belgium

Dose Response RelationshipStudy – Sampling periodProportion population
B-Pb > = 20 μg/L (%)
Average IQ-loss per individual (points) with B-Pb ≥ 20 μg/LIQ-loss per 100,000 individuals (points) attributable to B-Pb
20 μg/La
Cost per 100,000 individuals attributable to B-Pb
20 μg/L (106 EUR)a,b
Linear-logFLEHSI
2003–2004
56.621.67 (95% CI:1.03–2.3)94,280 (95% CI: 58,427-130,138)1835 (95% CI: 1137-2533)
FLEHSII
2008–2009
22.790.66 (95% CI:0.41–0.91)14,993 (95% CI: 9289-20,695)292 (95% CI: 181–403)
FLEHSIII
2013–2014
2.500.39 (95% CI:0.24–0.54)976 (95% CI: 604–1347)19 (95% CI: 12–26)
Sensitivity analysis: Linear-intervalFLEHSI
2003–2004
56.621.14 (95% CI:0.71–1.57)64,421 (95% CI: 39,923-88,913)1254 (95% CI: 777–1731)
FLEHSII
2008–2009
22.790.33 (95% CI:0.2–0.46)7539 (95% CI: 4672–10,404)147 (95% CI: 91–203)
FLEHSIII
2013–2014
2.500.18 (95% CI:0.11–0.25)451 (95% CI: 279–622)9 (95% CI: 5–12)
  1. Abbreviations: B-Pb Blood lead level, CI Confidence Interval
  2. aTaking into account the fraction of the population having B-Pb ≥ 20 μg Pb/L
  3. bBased on lifetime value of 1 IQ point, i.e. € 19,464 (euro 2018)