| Age years | 72.4±6.9 |
| Females/males | 28 (51)/27 (49) |
| Height cm | 168.0±9.4 |
| Smoking history | |
| Active | 1 (2) |
| Previous | 34 (62) |
| Never | 20 (36) |
| Transplanted | 2 (4) |
| Surgical lung biopsy confirmation | 31 (56) |
| Mean interval between HRCT scans days | 289.2±109.7 (55–540) |
| Median follow-up years (range) | 2.4 (0.1–8.5) |
| Deaths | 37 (67) |
| Scan type 110 HRCT scans | |
| GE 83 | 75 |
| Siemens 27 | 25 |
Data are presented as mean±sd, n (%), mean±sd (range) or n, unless otherwise stated. HRCT: high-resolution computed tomography. #: total subjects n=55.