Predicted spirometric values and maximal respiratory pressures calculated by the present study and references 6 and 8, respectively, for an average adult male (M) and an average adult female (F)
| Sex | Face mask | Ref. 8 | Ref. 6 | |
| MEP kPa | M | 13.4 | 14.4 | |
| F | 10.1 | 9.7 | ||
| MIP kPa | M | 10.0 | 10.1 | |
| F | 7.9 | 7.8 | ||
| FVC L | M | 5.14 | 4.31 | |
| F | 4.38 | 3.55 | ||
| FEV1 L | M | 4.58 | 3.66 | |
| F | 3.75 | 3.20 | ||
| FEV1/FVC | M | 89.1 | 80.0 | |
| F | 89.1 | 81.5 |
MEP: maximal expiratory pressure
MIP: maximal inspiratory pressure
FVC: forced vital capacity
FEV1: forced expiratory volume in one second
The average values for both M and F subjects were 40 yrs of age, height 170 cm and weight 70 kg