Spirometry findings of the patient
| Parameter | Predicted | LLN | Observed | % predicted |
| FVC L | 3.79 | 2.79 | 1.39 | 37 |
| FEV1 L | 3.01 | 2.17 | 1.25 | 41 |
| FEV1/FVC % | 86.14 | 74.35 | 89.85 | 104 |
| PEF L·s−1 | 7.91 | 5.92 | 2.90 | 37 |
| PIF L·s−1 | 2.64 | |||
| MEF L·s−1 | 3.40 | 1.69 | 1.85 | 54 |
| MEF50 L·s−1 | 4.17 | 2.02 | 2.01 | 48 |
| FIF50 L·s−1 | 2.62 | |||
| Empey's index | 6.9 | |||
| Miller and Hyatt index | 0.76 |
LLN: lower limit of normal; FVC: forced vital capacity; FEV1: forced expiratory volume in 1 s; PEF: peak expiratory flow; PIF: peak inspiratory flow; MEF: mean mid-expiratory flow from 25 -75% of FVC; MEF50: mid-expiratory flow at 50% of FVC; FIF50: forced inspiratory flow at 50% FVC; Empey's index: FEV1/PEF; Miller and Hyatt index: FEF50/FIF50.