Table 1.
Concentrations of arsenic, chromium, and nickel in the study population.
| Elementary school
|
All (n = 142)
|
||||||
|---|---|---|---|---|---|---|---|
| Variable | Longgang (n = 49) | Shalach (n = 45) | Shuntian (n = 48) | Mean ± SE | Geometric mean | Median | Maximum |
| Arsenic (μg/L urine) | 16.2 ± 2.6** | 8.7 ± 0.9 | 3.7 ± 0.6 | 9.1 ± 1.1 | 3.9 | 6.4 | 86.4 |
| Arsenic (μg/g urinary creatinine) | 21.3 ± 4.3** | 10.0 ± 1.2 | 4.7 ± 0.7 | 12.1 ± 1.6 | 5.0 | 7.7 | 149.3 |
| Chromium (μg/L urine) | 2.6 ± 0.2** | 1.9 ± 0.1 | 1.3 ± 0.1 | 1.9 ± 0.1 | 1.7 | 1.9 | 6.6 |
| Chromium (μg/g urinary creatinine) | 3.7 ± 0.5** | 2.2 ± 0.2 | 2.0 ± 0.2 | 2.7 ± 0.2 | 2.2 | 2.0 | 21.4 |
| Nickel (μg/L urine) | 5.4 ± 0.5* | 3.9 ± 0.3 | 2.8 ± 0.2 | 4.0 ± 0.2 | 3.2 | 3.4 | 14.5 |
| Nickel (μg/g urinary creatinine) | 7.2 ± 1.1** | 4.6 ± 0.5 | 4.1 ± 0.5 | 5.4 ± 0.4 | 4.0 | 4.1 | 47.8 |
All values shown are mean ± SE.
*
p = 0.01
**
p < 0.01, Kruskal-Wallis test.