Equations for Predicting Peak Expiratory Flow in Pediatric Patients

NOTE: Quanjer et al provides additional equations for PEFR.

 

Linear Equations Based on Height

 

PEFR in liters per minute for heights from 43 to 67 inches (data of Voter analyzed in JMP) =

= (13.33 * (height in inches)) - 426.52 =

= (5.249 * (height in cm)) - 426.52

 

PEFR in liters per minute for 4 to 18 years (Weng and Levinson) =

= (4.90 * (height in cm)) - 379

 

PEFR in liters per minute for boys (Nairn et al) =

= (5.59 * (height in cm)) - 476

 

PEFR in liters per minute for girls (Nairn et al) =

= (5.33 * (height in cm)) - 441

 

PEFR in liters per second (Robinson, from Cotes page 465) =

= (4.93 * (height in meters, must be <= 1.1 meters) - 2.9

 

PEFR in liters per second (Cotes page 460) =

= (7.59 * (height in meters) - 5.53

 

PEFR in liters per second (Cotes page 460) =

= (15.94 * (sitting height in meters) - 6.87

 

PEFR in liters per minute (Polgar and Promadhat) =

= (5.2428 * (height in cm)) - 425.57

 

PEFR in liters per minute for boys 5 to 18 years (Godfrey) =

= (5.288 * (height in cm)) - 422.76

 

PEFR in liters per minute for girls 5 to 18 years (Godfrey) =

= (5.278 * (height in cm)) - 422.34

 

PEFR in liters per second for boys 4-19 years < 162.6 cm (Rosenthal) =

= (0.073 * (height in cm)) - 5.98

 

PEFR in liters per second for boys 4-19 years >= 162.6 cm (Rosenthal) =

= (0.125 * (height in cm)) - 13.14

 

PEFR in liters per second for girls 4-19 years < 152.6 cm (Rosenthal) =

= (0.079 * (height in cm)) - 6.79

 

PEFR in liters per second for girls 4-19 years >= 152.6 cm (Rosenthal) =

= (0.064 * (height in cm)) - 3.94

 

PEFR in liters per minute for boys 4.5 to 18.5 years (Murray and Cook) =

= (5.70 * (height in cm)) - 480

 

PEFR in liters per minute for girls 4.5 to 18.5 years (Murray and Cook) =

= (4.65 * (height in cm)) - 344

 

Exponent of Height

 

PEFR in liters per minute for 7 to 19 years old (Hsu et al) =

= A * 10^(-4) * ((height in cm)^B)

 

Boys 7 - 19 years	A	B
black	1.74	2.92
hispanic	7.69	2.63
white	3.35	2.78

 

 

Girls 7 - 19 years	A	B
black	5.51	2.68
hispanic	6.97	2.64
white	20.58	2.37

 

 

PEFR in liters per minute (DeMuth et al) =

= A * 10^(-4) * ((height in cm)^B)

 

Gender	A	B
boys	4.796	2.642
girls	1.415	2.864