Lung function
| Parameter | ASPEN cohort# |
|---|---|
| Lung function, mean±sd | |
| Post-BD FEV1 L | 1.93±0.78 |
| Post-BD FEV1 % predicted | 73.2±23.4 |
| Post-BD FVC L | 2.82±0.99 |
| Post-BD FVC % predicted | 81.6±19.3 |
| Post-BD % predicted FEV1 categories, n (%) | |
| >80% | 634 (37.7) |
| 50–80% | 728 (43.3) |
| 30–49% | 287 (17.1) |
| <30% | 9 (0.5) |
| Lung function pattern post-BD spirometry, n (%) | |
| Obstruction (FEV1/FVC <0.7) | 842 (50.1) |
| PRISm¶ | 301 (17.9) |
| Normal spirometry (FEV1 >80% predicted and FEV1/FVC >0.7) | 515 (30.6) |
BD: bronchodilator; FEV1: forced expiratory volume in 1 s; FVC: forced vital capacity; PRISm: preserved ratio impaired spirometry. #: n=1682; ¶: PRISm, FEV1 <80% of predicted and FEV1/FVC ratio >0.7 [19].