Sciulli and Pfau developed equations for estimating body weight for a child based on the midshaft diameter of the femur. The authors are from the Ohio State University in Columbus.
Patient selection: <= 20 years of age
Measurement of femoral shaft diameter was based on the maximum midshaft diameter measured on an X-ray.
Parameters:
(1) midshaft transverse diameter of the femur in mm
(2) gender
(3) race (White or Black only)
(4) age in years
If the age is not known:
weight in pounds =
= (factor A) * ((femoral diameter in mm)^(factor B))
|
Gender |
Race |
Factor A |
Factor B |
|
male |
Black |
0.299 |
1.8 |
|
male |
White |
0.265 |
1.842 |
|
male |
Black and White |
0.274 |
1.83 |
|
female |
Black |
0.344 |
1.729 |
|
female |
White |
0.250 |
1.879 |
|
female |
Black and White |
0.269 |
1.845 |
|
entire group |
Black and White |
0.276 |
1.830 |
If the age is known:
weight in pounds =
= (factor A) * ((femoral diameter in mm)^(factor B)) * ((age in years)^(factor C))
|
Gender |
Race |
Factor A |
Factor B |
Factor C |
|
male |
Black |
0.765 |
1.421 |
0.132 |
|
male |
White |
0.583 |
1.530 |
0.095 |
|
male |
Black and White |
0.636 |
1.493 |
0.106 |
|
female |
White |
1.429 |
1.174 |
0.205 |
|
female |
Black and White |
1.468 |
1.162 |
0.200 |
|
entire group |
Black and White |
0.780 |
1.405 |
0.132 |
Specialty: Clinical Laboratory
