Demographic, clinical and laboratory data
| Variable | |
| Subjects n | 64 |
| Demographics | |
| Age yrs* | 50 (23–72) |
| Male/female | 44/20 |
| Symptoms# | |
| Dyspnoea | 28 (80) |
| Cough | 11 (32) |
| Chest pain | 2 (5) |
| Asymptomatic | 4 (11) |
| Pulmonary function pattern¶ | |
| Normal | 1 (3) |
| Obstructive | 13 (43) |
| Restrictive | 11 (37) |
| Mixed | 5 (17) |
| Low DL,CO+ | 17 (94) |
Data are presented as n, mean (range) or n (%). DL,CO: diffusing capacity of the lung for carbon monoxide. #: n = 35; ¶: n = 30; +: n = 18.