Centre | Maternal Hair Geometric mean(range) Ppm (parts per million) | Fetal Hair Geometric mean (range) ppm |
---|---|---|
Hull (United Kingdom) | 1.5 | 1.4 |
Unleaded petrol | (0.41-5.44) | (0.26-5.9) |
N=26 | N=22 | |
Ibadan | 33.2 | 1.5 |
(Nigeria) | (0.76-355.4) | (0.98-3.6) |
Leaded petrol | N=13 | N=10 |
Khartoum | 14.4 | 1.2 |
(Sudan) | (3.3-195.8) | (0.48-11.9) |
Unleaded petrol | N=24 | N=23 |
Cape Town A | 5.1 | 0.24 |
(South Africa) | (0.20-44.0) | (0.01-3.04) |
Leaded Petrol | N=30 | n=27 |
Cape Town B | 3.8 | 0.73 |
(South Africa) | (0.70-14.6) | (0.24-8.5) |
Transition to Unleaded Petrol | N=30 | N=25 |