Table 2 Estimated IQ and economic cost over a 15-year period in Flanders, Belgium: Comparison of IQ decrement and economic costs attributable to blood lead levels above 20 μg/L within the Flemish population of 15 year-olds between 2000 and 2014, and from 2015 to 2029
Dose response relationship | Time span | Number of 15 year-olds in study period | Proportion population B-Pb > = 20 μg/L (%) | Number of 15 year-olds with B-Pb > = 20 μg/L | Average IQ-loss (points) per individual with B-Pb > = 20 μg/L | IQ-loss (points) attributable to B-Pb > = 20 μg/La | Cost attributable to B-Pb > = 20 μg/L (milj. EUR)a,d |
|---|---|---|---|---|---|---|---|
Linear-log | FLEHSI (2000–2004) | 340,355 | 56.62 | 192,717 | 1.67 (95% CI:1.03–2.3) | 320,888 (95%CI: 198,859-442,931) | 6246 (95%CI: 3873-8621) |
FLEHSII (2005–2009) | 364,704 | 22.79 | 83,129 | 0.66 (95% CI:0.41–0.91) | 54,680 (95%CI: 33,878-75,475) | 1064 (95%CI: 659–1469) | |
FLEHSIII (2010–2014) | 347,761 | 2.50 | 8689 | 0.39 (95% CI:0.24–0.54) | 3394 (95%CI: 2102-4684) | 66 (95%CI: 41–91) | |
2000–2014 | 1,052,820 | 378,962 (95%CI: 234,840-523,091) | 7376 (95%CI: 4571-10,181) | ||||
2015–2029 | 1,052,820c | 2.50c | 26305b | 0.39 (95% CI:0.24–0.54)c | 10,275 (95%CI: 6363–14,182) | 200 (95%CI: 124–276) | |
Sensitivity analysis: Linear-interval | FLEHSI (2000–2004) | 340,355 | 56.62 | 192,717 | 1.14 (95% CI:0.71–1.57) | 219,260 (95%CI: 135,881-302,619) | 4268 (95%CI: 2645-5890) |
FLEHSII (2005–2009) | 364,704 | 22.79 | 83,129 | 0.33 (95% CI:0.2–0.46) | 27,495 (95%CI: 17,041-37,944) | 535 (95%CI: 332–739) | |
FLEHSIII (2010–2014) | 347,761 | 2.50 | 8689 | 0.18 (95% CI:0.11–0.25) | 1569 (95%CI: 972–2164) | 31 (95%CI: 19–42) | |
2000–2014 | 1,052,820 | 248,323 (95%CI: 153,893-342,726) | 4833 (95%CI: 2995-6671) | ||||
2015–2029 | 1,052,820c | 2.50c | 26,305b | 0.18 (95% CI:0.11–0.25)c | 4750 (95%CI: 2942-6550) | 92 (95%CI: 57–127) |