Equations of Kim et al for Predicting Skeletal Muscle Mass in a Pediatric Patient from Dual Energy X-Ray Absorptiometry (DEXA) Measurement of Appendicular Lean Soft Tissue

 

Subjects: healthy pediatric patients with Tanner stage 4 or before (for Tanner stage 5 the equations in 02.19.18 are applicable).

 

Methods: DEXA scans

 

Parameters:

(1) appendicular lean soft tissue in kilograms

(2) weight in kilograms

 

total skeletal muscle mass in kilograms =

= (1.19 * (appendicular lean soft tissue kg)) - 1.135

 

total skeletal muscle mass in kilograms =

= (1.003 * (appendicular lean soft tissue kg)) + (0.039 * (weight)) - 1.315

 

Performance:

• For both equations the R-square is about 0.98 and SEE 0.5 kg.

• The patient's race did not impact the accuracy of the equation.

• The models may overpredict skeletal muscle in some patients with anorexia nervosa.