Table 2 Risk of death from lung cancer by cumulative silica dust exposure in mg m−3-years by categories, 1946–2003
Silica dust in mg m − 3 -years | Mean | Person-years | # of cases | RR 95% CI unadjusted | RR 95% CI adjusted for radon | RR 95% CI adjusted for radon, arsenic | RR 95% CI adjusted for radon, arsenic with effect modifiers |
|---|---|---|---|---|---|---|---|
0–0.5 | 0.1 | 681 780 | 137 | 1.00 Reference | 1.00 Reference | 1.00 Reference | 1.00 Reference |
0.5–2 | 1 | 394 559 | 283 | 1.12 (0.89–1.35) | 1.09 (0.86–1.31) | 1.08 (0.86–1.31) | 0.95 (0.77–1.12) |
2–5 | 3 | 274 523 | 356 | 1.26 (1.00–1.51) | 1.15 (0.91–1.38) | 1.13 (0.89–1.37) | 0.96 (0.78–1.13) |
5–10 | 7 | 238 032 | 430 | 1.38 (1.10–1.66) | 1.07 (0.83–1.30) | 1.05 (0.81–1.28) | 0.86 (0.67–1.04) |
10–20 | 14 | 264 140 | 936 | 2.45 (1.98–2.92) | 1.53 (1.19–1.88) | 1.47 (1.13–1.81) | 1.14 (0.87–1.40) |
20–30 | 24 | 108 502 | 664 | 3.76 (3.02–4.49) | 2.19 (1.64–2.75) | 2.05 (1.51–2.60) | 1.51 (1.08–1.94) |
30–56 | 34 | 23 151 | 189 | 4.71 (3.62–5.80) | 2.91 (1.96–3.83) | 2.79 (1.87–3.70) | 2.02 (1.28–2.75) |
Total | 5.9 | 1 984 687 | 2995 |
