Distribution of exposure intensity (n = 1042)
| Time weighted average exposure (mg/m3): | ||||||||
|---|---|---|---|---|---|---|---|---|
| Min | 10% | 25% | 50% | 75% | 90% | Max | ||
| Cases | 0.01 | 0.02 | 0.03 | 0.08 | 0.15 | 0.32 | 0.83 | |
| Controls | 0.01 | 0.02 | 0.04 | 0.07 | 0.12 | 0.19 | 0.88 | |
| Median of time weighted average exposure (mg/m3) in relation to the year of first exposure: | ||||||||
| <1940 | 1940–50 | 1950–60 | 1960–70 | 1970–80 | ⩾1980 | |||
| Stone/quarry industry (n = 364) | 0.24 | 0.12 | 0.09 | 0.06 | 0.05 | 0.05 | ||
| Ceramics industry (n = 678) | 0.07 | 0.07 | 0.07 | 0.05 | 0.04 | 0.04 | ||
| Cumulative exposure (mg/m3 • years): | ||||||||
| Min | 10% | 25% | 50% | 75% | 90% | Max | ||
| Cases (n = 247) | 0.12 | 0.68 | 1.53 | 2.97 | 5.31 | 11.81 | 25.92 | |
| Controls (n = 795) | 0.12 | 0.84 | 1.56 | 2.88 | 4.50 | 7.33 | 28.08 | |
| Peak exposure: | ||||||||
| ⩽0.15 mg/m3 | >0.15 mg/m3 | |||||||
| Cases (n = 247) | 115 (46.6%) | 132 (53.4%) | ||||||
| Controls (n = 795) | 436 (53.8%) | 359 (45.7%) | ||||||