[Comparative study of impedance-based predictive models of body composition].
It was proposed to analyse impedance (BIA) to determine bodily composition: water content, fat-free mass (FFM) and fat mass. Different regression equations were accordingly designed which related impedance obtained by BIA to age, weight, height and sex. We analyzed the result obtained with five different models, already described, in a population comprising 46 persons, 13 men and 33 women, of ages 42.9 +/- 17.7 and 38.6 +/- 15.8 (mean +/- DE) respectively. The results for FFM (Kg) obtained from the different equations were highly spread (43.8 +/- 6.5 to 48.2 +/- 7.6 in women, and 48.7 +/- 10.5 to 59.1 +/- 12.7 in men). The significant coefficients of correlation varied between 0.99 and 0.70 for men and 0.98 and 0.71 in women. In most of the equations, weight is the variable which best correlates with FFM. The results obtained point to the need to seek the predictive equation which best adjusts to the population studied, and to develop more accurate methods for determining body composition.
Gómez
I
I
Servicio de Endocrinología y Nutrición, Hospital 12 de Octubre, Madrid, España.
León-Sanz
M
M
Valero
M A
MA
Martínez
G
G
Hawkins
F
F
D000328:Adult; D000368:Aged; D000465:Algorithms; D000886:Anthropometry / Q000379:methods*; D001823:Body Composition; D001835:Body Weight; D017097:Electric Impedance; D004750:Enteral Nutrition; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D008954:Models, Biological; D009765:Obesity / Q000473:pathology
Estudio comparativo de modelos predictivos de la composición corporal basados en impedancia.