Table 1 Estimated global cognitive damage from childhood lead exposure

From: Environmental lead risk in the 21st century

 

Baselinea

log-normalb

Lower boundb

Lower CIb

Upper CIb

5% increaseb

10% increaseb

Relative IQ cost (expressed in percentage of earning loss,%)

Africa

12.3

11.9

5.3

6.9

17.7

12.7

13.0

Asia

10.7

7.5

3.8

6.1

15.4

10.9

11.2

Europe

4.2

1.2

0.4

2.4

6.1

4.5

4.6

North America

5.2

0.7

0.2

2.9

7.5

5.5

5.7

Oceania

5.5

1.0

0.3

3.1

7.9

5.7

5.9

South/Central America

10.2

6.9

2.9

5.7

14.6

10.2

10.4

Total IQ cost (expressed in 2021 international dollars)

Global

$3.4 T

$1.8 T

$780B

$1.9 T

$4.9 T

$3.5 T

$3.6 T

  1. T trillion, B billion, CI confidence interval.
  2. aMain estimates.
  3. bSensitivity analysis.