FEV1 Prediction Calculator | Pediatric Patients

NOTE: Quanjer et al provides many additional equations for FEV1.

 

Linear Equations Based on Height

 

FEV1 in liters for males 5-18 years old and 42-59 inches tall (Dickman) =

= (0.085 * (height in inches)) - 2.855

 

FEV1 in liters for males 5-18 years old and 60-78 inches tall (Dickman) =

= (0.121 * (age in years)) + (0.143 * (height in inches)) - 7.864

 

FEV1 in liters for females 5-18 years old and 42-59 inches tall (Dickman) =

= (0.074 * (height in inches)) - 2.482

 

FEV1 in liters for females 5-18 years old and 60-78 inches tall (Dickman) =

= (0.085 * (age in years)) + (0.10 * (height in inches)) - 4.939

 

FEV1 in liters for 4 to 18 years (Weng and Levinson) =

= (0.040 * (height in cm)) - 3.99

 

FEV1 in liters for boys 5 to 18 years (Godfrey) =

= (0.051 * (height in cm)) - 4.77

 

FEV1 in liters for girls 5 to 18 years (Godfrey) =

= (0.041 * (height in cm)) - 3.35

 

FEV1 in liters for boys 4-19 years < 162.6 cm (Rosenthal) =

= (0.034 * (height in cm)) - 2.780

 

FEV1 in liters for boys 4-19 years >= 162.6 cm (Rosenthal) =

= (0.052 * (height in cm)) - 5.108

 

FEV1 in liters for girls 4-19 years < 152.6 cm (Rosenthal) =

= (0.033 * (height in cm)) -2.734

 

FEV1 in liters  for girls 4-19 years >= 152.6 cm (Rosenthal) =

= (0.041 * (height in cm)) - 3.680

 

Exponent of Height

 

FEV1 in liters for 7 to 19 year olds (Hsu et al) =

= A * 10^(-3) * ((height in cm)^B)

 

Boys 7 - 19 years	A	B
black	1.03	2.92
hispanic	1.73	2.85
white	0.774	3.00

 

 

Girls 7 - 19 years	A	B
black	1.14	2.89
hispanic	1.61	2.85
white	3.79	2.68

 

FEV1 in liters (Polgar and Promadhat) =

= (0.0000021 * ((height in cm)^2.8))

 

FEV1 in liters for 5 to 25 years of age (Lebowitz et al) =

= 6.844 + (0.040 * (age in years)) - (0.281 * (height in inches)) + (0.003 * ((height in inches)^2))

 

Natural Logarithm

 

FEV1 in liters (Wang et al) =

= EXP((B * (LN(height in meters))) + A)

 

Boys - Age in Years	A	B
6	-0.109	2.252
7	-0.104	2.270
8	-0.089	2.257
9	-0.063	2.197
10	-0.057	2.212
11	-0.093	2.324
12	-0.161	2.512
13	-0.292	2.843
14	-0.329	2.983
15	-0.141	2.709
16	0.062	2.409
17	0.262	2.099
18	0.251	2.129

 

 

Girls - Age in Years	A	B
6	-0.109	1.949
7	-0.144	2.243
8	-0.137	2.239
9	-0.123	2.222
10	-0.161	2.364
11	-0.223	2.558
12	-0.264	2.709
13	-0.153	2.535
14	0.046	2.178
15	0.148	2.008
16	0.181	1.972
17	0.176	1.992
18	0.152	2.031