Overview :

The peak expiratory flow rate (PEFR) in adults can be predicted based on physical characteristics.

NOTE: PEFR is referred to as Vmax in Cherniack et al.

PEFR in liters per second for White males 15-79 years (Cherniack, 1972) =

= (0.14393 * (height in inches)) - (0.02403 * (age in years)) + 0.22544

PEFR in liters per second for White females 15-79 years (Cherniack, 1972) =

= (0.09130 * (height in inches)) - (0.01776 * (age in years)) + 1.13160

PEFR in liters per second for White males 25-85 years (Knudson, 1976) =

= (0.094 * (height in cm)) - (0.035 * (age in years)) - 5.993

PEFR in liters per second for White females 20-88 years (Knudson, 1976) =

= (0.049 * (height in cm)) - (0.025 * (age in years)) - 0.735

PEFR in liters per second for White males 18-86 years years (Roberts, 1991) =

= (5.317 * (height in meters)) - (0.062* (age in years)) + 3.884

PEFR in liters per second for White females 18-86 years (Roberts, 1991) =

= (4.087 * (height in meters)) - (0.050* (age in years)) + 2.945

Cherniack RM, Raber MB. Normal standards for ventilatory function using an automated wedge spirometer. Am Review Respir Dis. 1972; 106: 38-46.

Knudson RJ, Slatin RC, et al. The maximal expiratory flow-volume curve. Normal standards, variability, and effects of age. Am Rev Respir Dis. 1976; 113: 587-600. (Table 9, page 596)

Roberts CM, MacRae KD, et al. Reference values and prediction equations for normal lung function in a non-smoking white urban population. Thorax. 1991; 46: 643-650.

Ruppel GE. Manual of Pulmonary Function Testing, Sixth Edition. Mosby. 1994. pages 461-462.