Rush et al reported an equation for estimating the fat-free mass (FFM) of pediatric patients in New Zealand. The authors are from Auckland University of Technology, the University of Queensland and Centro de Investigacion en Alimentacion y Desarrollo in Mexico.

Patient selection: pediatric patients in New Zealand, from 5 to 14 years of age involving a mix of European, Maori and Pacific Island descent


Method of analysis: BIA



(1) height in centimeters

(2) resistance in Ohms

(3) weight in kilograms


fat-free mass in kilograms =

= (0.622 * ((height)^2) / (resistance)) + (0.234 * (weight)) + 1.166

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