Ellis et al developed equations for estimating fat and fat-free mass in pediatric patients from three ethnic groups. The authors are from Baylor College of Medicine in Houston.
Subjects: males and females from 3 to 18 years of age, with ethnic backgrounds European, Afro-American and Hispanic.
Parameters:
(1) race – White, Black, Hispanic
(2) gender
(3) height in centimeters
(4) age in years
fat mass of a White female =
= (0.642 * (weight in kg)) – (0.120 * (height in cm)) – (0.606 * (age)) + 8.98
fat mass of a Black female =
= (0.653 * (weight in kg)) – (0.163 * (height in cm)) – (0.298 * (age)) + 10.7
fat mass of an Hispanic female =
= (0.667 * (weight in kg)) – (0.217 * (height in cm)) + 15.5
fat mass of a White male =
= (0.534 * (weight in kg)) – (1.59 * (age)) + 3.03
fat mass of a Black male =
= (0.594 * (weight in kg)) – (0.381 * (height in cm)) + 36
fat mass of an Hispanic male =
= (0.591 * (weight in kg)) – (1.82 * (age)) + 3.36
fat-free mass =
= (body mass) – (fat mass)
