Figure 1 data: FEV1/FVC is normal at 92%
| Actual | % predicted | |
|---|---|---|
| Note similar reduction in volumes and flows when assessed by % predicted. | ||
| FEF, forced expiratory flow; FEV1, forced expiratory volume in one second; FVC, forced vital capacity; PEF, peak expiratory flow. | ||
| FEV1 | 1.09 | 40% |
| FVC | 1.18 | 37% |
| FEV1/FVC% | 91.9 | 109% |
| PEF | 2.57 | 42% |
| FEF25 | 2.43 | 45% |
| FEF50 | 1.76 | 46% |
| FEF75 | 0.65 | 33% |