Table 2.
Stratified analysis of male and female lung cancer mortality by median groundwater arsenic level (µg/L).
| As Median | County Wt Males | Counties Males | Cases Males | SMR Males |
95% CI Males |
RR Males |
County Wt Females | Counties Females | Cases Females | SMR Females |
95% CI Females |
RR Females |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 3.0 | 3.0 | 49 | 12,595 | 0.89 | (0.84–0.94) | 1.00 | 3.0 | 42 | 3,026 | 0.89 | (0.81–0.96) | 1.00 |
| 3.1–3.9 | 3.5 | 15 | 1,947 | 0.91 | (0.82–0.99) | 1.02 | 3.5 | 13 | 455 | 0.90 | (0.77–1.03) | 1.02 |
| 4.0–4.9 | 4.1 | 25 | 11,199 | 0.88 | (0.82–0.94) | 0.97 | 4.1 | 21 | 2,907 | 0.89 | (0.81–0.96) | 0.99 |
| 5.0–5.9 | 5.0 | 18 | 1,251 | 0.92 | (0.81–1.04) | 1.05 | 5.0 | 11 | 235 | 0.87 | (0.73–1.02) | 0.98 |
| 6.0–6.9 | 6.1 | 16 | 1,317 | 0.91 | (0.79–1.02) | 0.98 | 6.1 | 11 | 251 | 0.93 | (0.82–1.05) | 1.07 |
| 7.0–7.9 | 7.1 | 11 | 369 | 0.86 | (0.70–1.01) | 0.94 | 7.2 | 6 | 61 | 1.05 | (0.80–1.30) | 1.13 |
| 8.0–9.9 | 8.3 | 15 | 1,413 | 0.94 | (0.85–1.03) | 1.10 | 8.4 | 10 | 223 | 0.75 | (0.58–0.92) | 0.71 |
| 10.0–14.9 | 11.2 | 12 | 1,952 | 0.84 | (0.73–0.94) | 0.89 | 11.3 | 10 | 385 | 0.87 | (0.72–1.02) | 1.16 |
| 15.0–24.9 | 20.1 | 7 | 868 | 0.95 | (0.78–1.12) | 1.13 | 20.4 | 5 | 170 | 0.84 | (0.57–1.10) | 0.97 |
| 25.0–59.9 | 39.7 | 3 | 123 | 0.83 | (0.53–1.13) | 0.88 | 41.2 | 3 | 31 | 0.82 | (0.67–0.97) | 0.98 |
|
| ||||||||||||
| 3.0 | 3.0 | 49 | 12,595 | 0.89 | (0.84–0.94) | 1.00 | 3.0 | 49 | 3,026 | 0.877 | (0.81–0.96) | 1.00 |
| 3.1–9.9 | 5.4 | 100 | 17,496 | 0.90 | (0.82–0.99) | 1.01 | 5.3 | 72 | 4,132 | 0.890 | (0.84–0.94) | 1.01 |
| 10.0–59.9 | 17.9 | 22 | 2,943 | 0.87 | (0.82–0.94) | 0.98 | 18.8 | 18 | 586 | 0.853 | (0.76–0.95) | 0.97 |
County Wt: county weighted, SMR: standardized mortality ratio, CI: confidence interval, RR: relative risk.