| Cases,n = 30 | Controls,n = 2522 | |
| Lived with asbestos worker (%) | 90.0 | 65.6 |
| Washed clothes of asbestos worker (%) | 53.3 | 21.8 |
| Time since first exposure (years)* | 38.3 | 40.6 |
| Intensity of exposure (f/ml)* | 3.1 | 2.68 |
| Cumulative asbestos exposure (f/ml years)* | 16.8 | 7.34 |
| Duration of residence (years)* | 5.4 | 3.06 |
*Mean of the mean of each set of matched controls.