Evolution during follow-up (n = 79)
| Months follow-up | 8.0±3.2 |
| ≥1 exacerbation during follow-up | 21 (26.6) |
| Exacerbations in follow-up per yr | 0 (0–1) |
| Change FEV1 post-bronchodilation mL·yr−1 | -72 (-270–120) |
| Former smokers# | -50 (-390–126) |
| Current smokers# | -76 (-240–90) |
| Sputum cultures baseline and follow-up | |
| PPMs in both | 42 (53.2) |
| Same PPM strain in both | 12 (15.2) |
| PPMs and neutrophilia¶ in both | 16 (20.3) |
| Same PPM strain and neutrophilia¶ in both | 12 (15.2) |
Data are presented as mean±sd, n (%) or median (interquartile range). FEV1: forced expiratory volume in 1 s; PPM: potentially pathogenic microorganisms. #: difference statistically nonsignificant (p>0.25, Mann–Whitney U-test). ¶: Murray-Washington score ≥3.