Prediction equations for the means of lung function variables
| Equation | R2# | |
| Males | ||
| FVC L | exp(-10.258+2.280 ln(H)+0.00676A-0.000124A2) | 0.549 |
| FEV1 L | exp(-8.957+2.014 ln(H)+0.00281A-0.000105A2) | 0.639 |
| MEF75 L·s−1 | exp(-2.227+0.812 ln(H)+0.00977A-0.000132A2) | 0.108 |
| MEF50 L·s−1 | exp(-3.055+0.911 ln(H)+0.00249A-0.000109A2) | 0.226 |
| MEF25 L·s−1 | exp(-3.970+1.009 ln(H)-0.01645A-0.000020A2) | 0.419 |
| FEV1/FVC % | exp(+6.291-0.341 ln(H)-0.00441A+0.000026A2) | 0.126 |
| PEF L·s−1 | exp(-3.760+1.170 ln(H)+0.00706A-0.000110A2) | 0.233 |
| Females | ||
| FVC L | exp(-9.069+2.013 ln(H)+0.00847 A-0.000155A2) | 0.562 |
| FEV1 L | exp(-8.397+1.865 ln(H)+0.00570 A-0.000150A2) | 0.526 |
| MEF75 L·s−1 | exp(-2.716+0.867 ln(H)+0.00963 A-0.000140A2) | 0.184 |
| MEF50 L·s−1 | exp(-2.131+0.674 ln(H)+0.00895 A-0.000180A2) | 0.253 |
| MEF25 L·s−1 | exp(-4.861+1.145 ln(H)-0.01120 A-0.000096A2) | 0.423 |
| FEV1/FVC % | exp(+5.637-0.219 ln(H)-0.00249 A+0.000004A2) | 0.039 |
| PEF L·s−1 | exp(-4.794+1.316 ln(H)+0.00926 A-0.000143A2) | 0.329 |
FVC: forced vital capacity; FEV1: forced expiratory volume in one second; MEF25 or 50 or 75: maximal instantaneous forced expiratory flow when 25, 50 or 75% of the FVC remains to be exhaled, respectively; PEF: peak expiratory flow; H: height (cm); A: age (yrs); exp(x): ex. #: fraction of explained variance.