Table 7.
Average concentrations of blood lead (Pb) and urinary mercury (Hg), nickel (Ni), and chromium (Cr) in study subjects stratified by location.
| Heavy Metal in Biological Sample | BanKok (84) | BanKlang (18) | p | ||||
|---|---|---|---|---|---|---|---|
| Range | Mean ± SD | Median IQR | Range | Mean ± SD | Median IQR | ||
| Blood Pb (µg/dL) | 0.89–9.67 | 4.70 ± 2.11 | 3.27 | 2.74–7.98 | 5.34± 1.39 | 1.68 | 0.608 * |
| Urinary Cr (µg/g creatinine) | ND–5.03 | 0.68 ±0.99 | 0.49 | 0.15–2.54 | 0.80 ± 0.64 | 0.75 | 0.040 ** |
| Urinary Hg (µg/g creatinine) | 0.07–52.64 | 3.78 ± 7.45 | 1.86 | 0.33–3.36 | 1.50 ± 0.73 | 1.05 | 0.2260 ** |
| Urinary Ni (µg/g creatinine) | 0.30–99.96 | 6.48 ± 12.16 | 3.57 | 0.25–23.54 | 4.99 ± 5.55 | 4.47 | 0.629 ** |
IQR, interquartile range; ND, not detected; SD, standard deviation. * t-test; ** Mann-Whitney U test set at α = 0.05.