Table 4 Estimated percentage of study group with FEV1 less than 2.71, 2.45, or 2.09 l by estimated dust concentration for a 35 year working lifetime for non‐smokers and current smokers of age 60 and of average height (1.70 m).
| Deficit | FEV1 | Smoking | Concentration (mg/m3) | |||||
|---|---|---|---|---|---|---|---|---|
| 0 | 1 | 2 | 3 | 4 | 5 | |||
| Small | 2.71 | Non | 41.3 | 44.1 | 46.7 | 49.4 | 52.0 | 54.6 |
| Current | 61.5 | 64.2 | 66.6 | 69.0 | 71.2 | 73.5 | ||
| Medium | 2.45 | Non | 25.1 | 27.5 | 29.7 | 32.0 | 34.4 | 36.9 |
| Current | 43.7 | 46.5 | 49.2 | 51.8 | 54.4 | 57.0 | ||
| Large | 2.09 | Non | 9.8 | 10.9 | 12.2 | 13.5 | 15.0 | 16.6 |
| Current | 21.7 | 23.5 | 25.6 | 27.8 | 30.0 | 32.4 | ||
Small, medium, and large refer to deficits associated with increased risks of breathlessness of 1.5, 2.0, and 3.0 respectively.