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Table 2 Lifetime earning losses per year of the selected cohort according to IQ point losses within B-Pb concentration ranges (€2008)

From: Childhood lead exposure in France: benefit estimation and partial cost-benefit analysis of lead hazard control

Blood-lead concentrations range (μg/L) IQ point loss assumptionsa, b, c Number of childrend Number of IQ point losses Total Costs (€billion)e Lost life time earnings with a discount factor w30(€billion)
B-Pb < 15 0 2,348,091 0 0 0
15 ≤ B-Pb < 24 1 1,648,975 1,648,975 28.6 11.8
24 ≤ B-Pb < 100 4.9 (1+3.9) 693,783 1,421,769 24.7 10.2
B-Pb ≥ 100 6.8 (1+3.9+1.9) 5,333 36,265 0.6 0.3
TOTAL   4,696,182 3,107,009 53.9 22.3
  1. Based on a EFSA conclusions [1], b CEPA [24], c Lanphear and colleagues. [14], d InVS data [11] and e Gould [8]
  2. Table 2 presents lifetime earning losses per year of the selected cohort according to IQ point losses within B-Pb concentration ranges. The IQ point loss assumptions were 1, 4.9 (= 1+3.9) with 0.51 point per 10 μg/L within this range, and 6.8 (= 1+3.9 +1.9) IQ point losses per 100 μg/L within this range, from 15 to 24 μg/L, from 24 to 100 μg/L, and above 100 μg/L respectively. The loss per IQ point was estimated to be €200817, 363. Based on the equation 3 (Bearn = Bearn15-24 + Bearn24-100 + Bearn≥100), the total lost lifetime earnings due to lead toxicity Bearn were estimated, with Bearn15-24 for increased B-Pb <24 μg/L, Bearn24-100 for B-Pb between 24 μg/L and 100 μg/L, and Bearn≥100 for B-Pb ≥100 μg/L. We applied a discount factor w30 on the total costs and we obtained € 22.3 billion, € 10.5 billion and € 0.3 billion, respectively for the year 2008.