Examination: proximal femure
Measurements:
(1) femoral neck width (FNW) in cm (supero-inferior femoral neck diameter) = narrowest distance across the femoral neck and perpendicular to the neck axis
(2) femoral neck axial length (FNAL) in cm = distance from the base of the greater trochanter to the apex of the femoral head
Both of the lines are perpendicular to each other.
The authors proposed 3 formulae and one decision tree.
equation 1 =
= (0.410 * (FNAL) – 37.156
equation 2 =
= (0.968 * (FNW)) – 30.445
equation 3 =
= (0.279 * (FNAL)) + (0.737 * (FNW)) – 48.587
A negative result for an equation indicates female gender.
A positive result indicates male gender.
A zero value is indeterminate.
|
FNW
|
FNAL
|
Gender
|
|
<= 31 cm
|
NA
|
female
|
|
> 31 cm
|
> 94 cm
|
male
|
|
> 34 cm
|
<= 94 cm
|
male
|
|
31.1 to 34 cm
|
> 90 cm
|
male
|
|
31.1 to 34 cm
|
<= 90 cm
|
female
|
