Table 1 Summary of the clinical characteristics of stable versus progressive IPF patients
| Characteristic | Number of cases | |
|---|---|---|
| Stable | Progressive | |
| All cases | 30 | 28 |
| Age (years) | ||
| Mean | 68 ± 8 | 70 ± 9 |
| Sex | ||
| Male | 19 | 17 |
| Female | 11 | 11 |
| Smoking history | ||
| Never | 13 | 8 |
| Ex-smoker | 16 | 20 |
| Current | 1 | – |
| FVC (% predicted) | 82 ± 20 | 73 ± 15 |
| DLCO (% predicted) | 53 ± 18 | 37 ± 14 |