Measurement of bioelectrical impedance can be used to estimate the amount of body fat present in a child. This can be used to monitor weight loss in a child over a time when growth and development may affect direct weight measurements. The authors are from Prague in the Czech Republic.
Subjects: children and adolescents up to 15 years of age (inclusive)
lean body mass in kilograms =
= (body mass in kilograms ) * (100 – (percent body fat)) / 100
For Boys Under 10 Years of Age
percent body fat =
= 39.2649 – (5.4577 * (age in years)) – (9.2044 * ((height in meters)^2)) + (0.4177 * (mass in kilograms)) + (0.0442 * (resistance in Ohms))
r = 0.796, p < 0.001, SEE = 0.94%
For Boys 10 to 15 Years of Age
percent body fat =
= 6.4649 – (0.0577 * (age in years)) – (9.2044 * ((height in meters)^2)) + (0.4077 * (mass in kilograms)) + (0.0084 * (resistance in Ohms))
r = 0.809, p < 0.001, SEE = 0.91%
For Girls Under 10 Years of Age
percent body fat =
= 14.6812 – (0.1105 * (age in years)) + (0.5938 * (mass in kilograms)) – (4.9063 * ((height in meters)^2) / (resistance in kiloOhms))
r = 0.748, p < 0.001, SEE =1.53%
For Girls 10 to 15 Years of Age
percent body fat =
= 10.8852 – (0.0968 * (age in years)) + (0.5634 * (mass in kilograms)) – (5.0603 * ((height in meters)^2) / (resistance in kiloOhms))
r = 0.768, p < 0.001, SEE = 1.33%
