Table 2.
Urinary arsenic concentrations resulting from inhalation of arsenic and standardized mortality ratios (SMR) for respiratory cancer in copper smelter workers in Tacoma, WA
| Mean Arsenic Concentration in Urine (μg/Liter) | Adjusted Mean Arsenic Concentration in Urine (μg/Liter)a | Observed Number of Respiratory Cancer Deaths | SMR | 95% CI | |
|---|---|---|---|---|---|
| 15.0 | 0 | 1 | |||
| 114.4 | 99.4 | 6 | 1.8 | 0.7 | 3.9 |
| 355.6 | 340.6 | 2 | 2.6 | 0.3 | 9.5 |
| 605.8 | 590.8 | 4 | 4.9 | 1.3 | 12.7 |
| 1178.5 | 1163.5 | 7 | 8.0 | 3.2 | 16.5 |
a
Adjusted by subtracting the baseline concentration of 15 μg/L.