Table 7 Relative risks for lung cancer by exposure to radon progeny, with and without adjustment for cigarette smoking, in a cohort of New Mexico underground uranium miners [8]
From: Radon exposure and lung cancer: risk in nonsmokers among cohort studies
Exposure category | Cigarette smoking | ||
|---|---|---|---|
Number of cases | Unadjusted (95Â % CI) | Adjusted (95Â % CI) | |
0–99.9 | 11 | 1.0 | 1.0 |
100–199.9 | 12 | 2.2 (1.0–5.1) | 2.2 (0.9–5.0) |
200–299.9 | 10 | 2.8 (1.2–6.7) | 2.7 (1.1–6.6) |
300–399.9 | 11 | 7.3 (3.1–17.2) | 7.1 (3.0–16.8) |
400–499.9 | 9 | 10.7 (4.3–26.4) | 10.8 (4.4–26.7) |
500–749.9 | 8 | 9.5 (3.7–24.2) | 9.0 (3.6–23.0) |
750–999.9 | 2 | 10.3 (2.2–46.9) | 9.9 (2.2–45.5) |
≥ 1000 | 4 | 12.3 (3.9–39.1) | 13.5 (4.3–43.1) |