Patient Characteristics
| Gender | 126Males,43Females |
| Age,years(Range) | 72(42-89) |
| Smoking | 29(17%)Yes,42(25%)No,98(58%) Ex-smoker |
| Asbestos exposure(n=164) | 78(48%)Yes,82(50%)No,3(2%) Possible |
| FEV1% (n=121) | 60.6(Range=30-99) |
| WHO Performance status | Median:1.5(Range 0-3) |