Lung cancer mortality trend by ILO categories and cumulative exposure to respirable silica dust, by latency since first diagnosis of silicosis
| No latency | 10 y latency | 20 y latency | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Obs4-150 | SMR (95% CI) | Obs4-150 | SMR (95% CI) | Obs4-150 | SMR (95% CI) | ||||||
| ILO categories: | |||||||||||
| 1/0–1/2 | 7 | 1.23 (0.59 to 2.57) | 6 | 1.39 (0.63 to 3.10) | 3 | 1.46 (0.47 to 4.49) | |||||
| 2/1–2/3 | 11 | 1.50 (0.83 to 2.70) | 8 | 1.45 (0.73 to 2.89) | 4 | 1.49 (0.56 to 3.95) | |||||
| 3/2+ | 16 | 1.34 (0.83 to 2.19) | 13 | 1.55 (0.90 to 2.66) | 7 | 1.91 (0.92 to 3.95) | |||||
| χ2 Trend statistic | NS | NS | NS | ||||||||
| Cumulative exposure to respirable silica: | |||||||||||
| ⩽5.0 (gh/m3) | 11 | 1.55 (0.59 to 2.57) | 7 | 1.43 (0.68 to 2.98) | 4 | 1.46 (0.47 to 4.49) | |||||
| 5.1–10.0 (gh/m3) | 13 | 1.25 (0.73 to 2.15) | 11 | 1.44 (0.80 to 2.58) | 5 | 1.43 (0.60 to 3.42) | |||||
| >10.0 (gh/m3) | 10 | 1.35 (0.73 to 2.51) | 9 | 1.60 (0.84 to 3.05) | 5 | 2.08 (0.88 to 4.91) | |||||
| χ2 Trend statistic | NS | NS | NS | ||||||||
↵4-150 Obs=Observed deaths.