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

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

Blood-lead concentrations range (μg/L)	IQ point loss assumptions^{a, b, c}	Number of children^d	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

Based on ^a EFSA conclusions [1], ^b CEPA [24], ^c Lanphear and colleagues. [14], ^d InVS data [11] and ^e Gould [8]
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 (B_earn = B_earn15-24 + B_earn24-100 + B_earn≥100), the total lost lifetime earnings due to lead toxicity B_earn were estimated, with B_earn15-24 for increased B-Pb <24 μg/L, B_earn24-100 for B-Pb between 24 μg/L and 100 μg/L, and B_earn≥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.

ISSN: 1476-069X