Table 3.
Pre-and postbronchodilator administration mean (SD) FEV1%
| N (%) | Reversibility | Pre-BD Mean FEV1% predicted (SD) | Post-BD Mean FEV1% predicted (SD) | |
|---|---|---|---|---|
| No AO: | ||||
| Pre-BD FEV1/FVC ≥ 70% | 169 (58%) | — | 91.1 (18.4) | 93.0 (18.7) |
| Post-BD FEV1/FVC ≥ 70% | ||||
| Pre-BD FEV1/FVC < 70% | 12 (4%) | 41.7% | 58.8 (31.3) | 67.4 (32.1) |
| Post-BD FEV1/FVC ≥ 70% | ||||
| AO: | ||||
| Pre-BD FEV1/FVC < 70% | 113 (38%) | 10.6% | 56.2 (24.2) | 58.8 (26.1) |
| Post-BD FEV1/FVC < 70% | ||||
Reversibility: ≥ 200 mL improvement and ≥ 12% improvement of baseline FEV1. SD: standard deviation; FEV1: forced expiratory volume in 1 second; BD: bronchodilator; COPD: chronic obstructive pulmonary disease; FVC: forced vital capacity.