Exposure characteristic | Cotton Dust | Wool Dust | ||
---|---|---|---|---|
Study 1 | Study 2 | Study 1 | Study 2 | |
(N=2739) | (N=2716) | (N=2739) | (N=2716) | |
% | % | % | % | |
Level of exposure | ||||
Non-substantial | 4.1 | 17.2 | 2.5 | 7.4 |
Substantial | 4.0 | 1.6 | 3.4 | 1.0 |
Exposure concentrationa | ||||
Low | 2.6 | 15.9 | 1.6 | 6.9 |
Medium | 4.2 | 2.4 | 3.8 | 1.4 |
High | 1.3 | 0.5 | 0.5 | 0.2 |
Confidence levela | ||||
Possible | 0.1 | 2.0 | 0.04 | 1.1 |
Probable | 1.3 | 5.1 | 1.1 | 1.9 |
Definite | 6.7 | 11.7 | 4.8 | 5.5 |
Frequency a | ||||
<5% of work week | 0.3 | 0.4 | 0.3 | 0.2 |
5-30% of work week | 1.6 | 3.8 | 1.4 | 1.7 |
>30% of work week | 6.2 | 14.4 | 4.3 | 6.5 |
Duration | ||||
1-5 years | 2.2 | 7.7 | 1.3 | 3.5 |
6-20 years | 3.1 | 6.9 | 2.2 | 3.3 |
>20 years | 2.8 | 4.2 | 2.4 | 1.6 |