Table 3 Measured mercury concentrations by age category
|  | N | 18–29 y Median (min-max) | 30–49 y Median (min-max) | 50+ y Median (min-max) | Total Median (min-max) | Wilcoxon test p-value |
|---|---|---|---|---|---|---|
Umbilical cord (ppb) | 99 | 3.5 (1.5–10) | 5.6 (1–78.5) | – | 5 (1–78.5) | 0.023 |
Childhood Hair Hg (μg/g) | 137 | 0.9 (0.5–2) | 0.7 (0.2–16) | 2.9 (0.6–15) | 1.1 (0.2–16) | <  0.0001 |
| Â | Â | Â | n (%) | n (%) | n (%) | Â |
Hair ≥ Hg 5 μg/g at least once | 208 | 0 | 27 (22.9%) | 49 (74.2%) | 76 (36.6%) | <  0.0001 |