Description of the exposure parameters used to assess asbestos exposure at job level
| Asbestos exposure parameters | Definition | Numerical values* |
|---|---|---|
| Probability of exposure | Degree of confidence that exposure really occurred, expressed in percent (%) | |
| Not exposed | 0 | 0 |
| Possible | >0–50 | 0.5 |
| Definite | >50–100 | 1 |
| Frequency of exposure | Expressed in percent of work time (%) | |
| Sporadic | >0–5 | 0.025 |
| Occasional | >5–30 | 0.25 |
| Frequent or continuous | >30–100 | 0.75 |
| Intensity of exposure | Expressed in f/mL | |
| Low | >0–0.1 | 0.1 |
| Medium | >0.1–1 | 1 |
| High | >1–10 | 10 |
| Very high | >10 | 100 |
*Numerical values assigned to each category in order to calculate cumulative exposure index.