The Forced Midexpiratory Flow Rate (FEF25-75%) can be predicted in pediatric patients based on height and other physical characteristics.
NOTE: Quanjer et al provides many additional equations for FEF25-75% (page 229s).
Linear Equations Based on Height
FEF25-75% in liters/second for males 5-18 years old and 42-59 inches tall (Dickman) =
= (0.094 * (height in inches)) - 2.614
FEF25-75% in liters/second for males 5-18 years old and 60-78 inches tall (Dickman) =
= (0.126 * (age in years)) + (0.135 * (height in inches)) - 6.498
FEF25-75% in liters/second for females 5-18 years old and 42-59 inches tall (Dickman) =
= (0.087 * (height in inches)) - 2.389
FEF25-75% in liters/second for females 5-18 years old and 60-78 inches tall (Dickman) =
= (0.083 * (age in years)) + (0.093 * (height in inches)) - 3.499
FEF25-75% in liters per second (Polgar and Promadhat) =
= ((2.621 * (height in cm)) - 207.7) / 60
Natural Logarithm
FEF25-75% in liters per second (Wang et al) =
= EXP((B * (LN(height in meters))) + A)
|
Boys - Age in Years |
A |
B |
|---|---|---|
|
8 |
0.264 |
1.505 |
|
9 |
0.308 |
1.443 |
|
10 |
0.290 |
1.557 |
|
11 |
0.242 |
1.738 |
|
12 |
0.165 |
1.982 |
|
13 |
0.007 |
2.396 |
|
14 |
0.014 |
2.483 |
|
15 |
0.241 |
2.163 |
|
16 |
0.503 |
1.764 |
|
17 |
0.762 |
1.368 |
|
18 |
0.678 |
1.528 |
|
Girls - Age in Years |
A |
B |
|---|---|---|
|
8 |
0.247 |
1.668 |
|
9 |
0.254 |
1.710 |
|
10 |
0.195 |
1.933 |
|
11 |
0.161 |
2.091 |
|
12 |
0.185 |
2.120 |
|
13 |
0.294 |
1.976 |
|
14 |
0.450 |
1.711 |
|
15 |
0.581 |
1.486 |
|
16 |
0.654 |
1.366 |
|
17 |
0.688 |
1.290 |
|
18 |
0.520 |
1.622 |
Specialty: Pulmonology
ICD-10: ,
