Biological exposure indices in workers
| Lead exposed workers (n=123) | Referent workers (n=70) | |||||
|---|---|---|---|---|---|---|
| Mean | (SD) | Range | Mean | (SD) | Range | |
| Blood lead (μg/dl) | 55.42 | 13.52 | 22.5–99.4 | 6.42 | 1.55 | 3.8–11.4 |
| δ-ALA in plasma (μg/l) | 80.36 | 72.90 | 3.31–380.83 | 2.35 | 0.82 | 1.34–5.88 |
| δ-ALA in urine (mg/l) | 16.41 | 13.50 | 1.25–63.38 | 1.08 | 0.21 | 0.66–1.55 |