Equation of Kyle et al for Appendicular Skeletal Muscle Mass (ASMM) in an Adult Using Bioelectric Impedance Analysis (BIA)

Appendicular skeletal muscle is that in the limbs. It comprises > 75% of total skeletal muscle mass.

Patient selection: Australian adults

Parameters:

(1) height in centimeters

(2) weight in kilograms

(3) resistance in Ohms at 50 Hz

(4) reactance in Ohms at 50 Hz

(5) sex (male 1, female 0)

(6) age in years

skeletal muscle mass in kilograms =

= (0.267 * ((height)^2) / (resistance)) + (0.095 * (weight)) - (0.012 * (age)) + (0.058 * (reactance)) + (1.909 * (points for sex)) - 4.211