Lag (years) | Fibre exposure (f-y/ml) | Deaths | Person-years | RR* | 95% CI | LR (4) | AIC | |
Lung cancer | ||||||||
0 | <2.3 | 37 | 37210 | 1.00 | 7.18 | 2350.2 | ||
2.3–<11.5 | 36 | 32079 | 1.00 | 0.63 to 1.59 | ||||
11.5–<34.8 | 36 | 20371 | 1.50 | 0.95 to 2.39 | ||||
34.8–<152.7 | 36 | 21788 | 1.12 | 0.70 to 1.79 | ||||
>152.7 | 36 | 12581 | 1.78 | 1.09 to 2.91 | ||||
10 | <2.3 | 37 | 59163 | 1.00 | 8.23 | 2350.5 | ||
2.3–<11.5 | 37 | 23304 | 1.13 | 0.71 to 1.78 | ||||
11.5–<34.8 | 35 | 15151 | 1.58 | 0.99 to 2.53 | ||||
34.8–<152.7 | 37 | 16738 | 1.25 | 0.79 to 2.00 | ||||
>152.7 | 35 | 9673 | 1.88 | 1.14 to 3.08 | ||||
20 | <2.3 | 42 | 81605 | 1.00 | 9.62 | 2349.1 | ||
2.3–<11.5 | 34 | 14790 | 1.23 | 0.77 to 1.96 | ||||
11.5–<34.8 | 35 | 9945 | 1.82 | 1.15 to 2.89 | ||||
34.8–<152.7 | 39 | 11307 | 1.52 | 0.97 to 2.40 | ||||
>152.7 | 31 | 6382 | 1.88 | 1.14 to 3.10 | ||||
30 | <2.3 | 65 | 101968 | 1.00 | 13.85 | 2344.9 | ||
2.3–<11.5 | 27 | 7244 | 1.32 | 0.82 to 2.14 | ||||
11.5–<34.8 | 32 | 5144 | 2.09 | 1.32 to 3.29 | ||||
34.8–<152.7 | 29 | 6237 | 1.40 | 0.87 to 2.24 | ||||
>152.7 | 28 | 3436 | 2.13 | 1.30 to 3.49 | ||||
Asbestosis | ||||||||
0 | <232.2 | 8 | 115487 | 1.00 | 76.08 | 520.3 | ||
232.2–<356.9 | 7 | 3000 | 22.42 | 7.77 to 64.69 | ||||
356.9–<532.0 | 7 | 2513 | 29.14 | 9.94 to 85.43 | ||||
532.0–<842.4 | 7 | 2117 | 23.26 | 7.80 to 69.36 | ||||
>842.4 | 7 | 912 | 68.46 | 21.43 to 218.63 | ||||
10 | <232.2 | 9 | 117579 | 1.00 | 75.58 | 520.8 | ||
232.2–<356.9 | 8 | 2350 | 25.84 | 9.50 to 70.30 | ||||
356.9–<532.0 | 5 | 1859 | 21.51 | 6.76 to 68.43 | ||||
532.0–<842.4 | 7 | 1564 | 24.24 | 8.28 to 70.90 | ||||
>842.4 | 7 | 677 | 66.17 | 21.20 to 206.50 | ||||
20 | <232.2 | 14 | 119859 | 1.00 | 53.44 | 542.9 | ||
232.2–<356.9 | 6 | 1549 | 14.58 | 5.22 to 40.73 | ||||
356.9–<532.0 | 5 | 1256 | 14.87 | 4.88 to 45.31 | ||||
532.0–<842.4 | 6 | 987 | 15.33 | 5.32 to 44.20 | ||||
>842.4 | 5 | 378 | 35.54 | 10.88 to 116.08 | ||||
30 | <232.2 | 18 | 121828 | 1.00 | 46.02 | 550.4 | ||
232.2–<356.9 | 7 | 913 | 15.33 | 5.77 to 40.72 | ||||
356.9–<532.0 | 3 | 677 | 9.40 | 2.58 to 34.31 | ||||
532.0–<842.4 | 6 | 466 | 19.89 | 6.98 to 56.71 | ||||
>842.4 | 2 | 145 | 21.74 | 4.51 to 104.78 |
*Adjusted via Poisson for age (<60, 60–69, 70–79 or ⩾80 years), sex, race (white or other/unknown), decade of follow-up and birth cohort (<1920, 1920–1939 and ⩾1940) for lung cancer and age, sex, race and decade for asbestosis.
Exposure category boundaries selected to define five quantiles of total exposure among cases.
AIC, Akaike information criterion; LR (4), likelihood ratio for addition of exposure terms with 4 degrees of freedom; RR, rate ratio.