Observed | SMR (95% CI) | |
---|---|---|
ILO categories: | ||
1/0–1/2 | 47 | 4.63 (3.57 to 5.99) |
2/1–2/3 | 68 | 5.11 (4.13 to 6.33) |
3/2+ | 163 | 7.21 (6.33 to 8.22) |
χ2 Trend statistic | 9.56 | |
p=0.008 | ||
Cumulative exposure to respirable silica (gh/m3): | ||
⩽5.0 | 47 | 5.07 (4.23 to 6.08) |
5.1–10.0 | 68 | 6.08 (5.18 to 7.14) |
>10.0 | 163 | 7.52 (6.16 to 9.19) |
χ2Trend statistic | 6.17 | |
p=0.024 |