Table 3.
Equivalent urinary arsenic concentrations resulting from ingestion of arsenic and lung cancer odds ratios (OR) from a case-control study in Chile.
| Arsenic Concentration in Drinking Water (μg/Liter)a | Cases | Controls | Mean Arsenic Concentration in Drinking Water μg/Liter) | Mean Arsenic Concentration in Urine (μg/Liter)b | Adjusted Mean Arsenic Concentration in Urine (μg/Liter)c | ORd | 95% | CI |
|---|---|---|---|---|---|---|---|---|
| 0-9 | 11 | 92 | 5 | 4.9 | 0 | 1 | ||
| 10-59 | 7 | 81 | 35 | 34.0 | 29.1 | 0.7 | 0.3 | 1.7 |
| 60-199 | 35 | 87 | 130 | 126.1 | 121.3 | 3.4 | 1.8 | 6.5 |
| 200-399 | 23 | 44 | 300 | 291.0 | 286.2 | 4.7 | 2.0 | 11.0 |
| 400-699 | 11 | 12 | 550 | 533.5 | 528.7 | 5.7 | 1.9 | 16.9 |
| 700-999 | 64 | 103 | 850 | 824.5 | 819.7 | 7.1 | 3.4 | 14.8 |
a
Average concentration during the period of peak arsenic exposure from 1958 to 1970.
b
Calculated by multiplying arsenic concentration in drinking water by conversion factor of 0.97.
c
Adjusted by subtracting the baseline concentration of 4.9 μg/Liter.
d
Adjusted for age, sex, smoking status, employment in copper smelting, and socioeconomic status.