Table 3.
Average concentrations of chromium (Cr), mercury (Hg), nickel (Ni), and lead (Pb) in house dust and airborne dust stratified by village.
| BanKok (84) | BanKlang (18) | p | |||||
|---|---|---|---|---|---|---|---|
| Range | Mean ± SD | Median IQR | Range | Mean ± SD | Median IQR | ||
| House dust (mg/kg) | |||||||
| Cr | ND–6.33 | 1.51 ± 1.24 | 1.56 | 0.06–1.11 | 0.37 ± 0.30 | 0.40 | 0.000 |
| Hg | ND–1.04 | 0.07 ± 0.17 | 0.08 | ND–0.10 | 0.02 ± 0.03 | 0.04 | 0.328 |
| Ni | ND–12.00 | 1.32 ± 1.65 | 1.11 | ND–1.55 | 0.45 ± 0.42 | 0.51 | 0.000 |
| Pb | ND–79.27 | 5.86 ± 10.49 | 6.49 | ND–5.43 | 1.24 ± 1.66 | 2.09 | 0.000 |
| Air dust (µg/m3) | |||||||
| Cr | ND–0.14 | 0.03 ± 0.04 | 0.05 | ND–0.06 | 0.01 ± 0.02 | 0.01 | 0.001 |
| Hg | ND–0.26 | 0.14 ± 0.06 | 0.09 | ND–0.12 | 0.05 ± 0.03 | 0.02 | 0.000 |
| Ni | ND–0.13 | 0.04 ± 0.04 | 0.06 | ND | ND | ND | 0.000 |
| Pb | ND–1.66 | 0.09 ± 0.19 | 1.24 | ND–0.12 | 0.01 ± 0.03 | ND | 0.000 |
IQR, interquartile range; ND, not detected; SD, standard deviation. Mann-Whitney U test significance set at α = 0.05.