Cross-validation of modified fatness-specific bioelectrical impedance equations

Citation
Dw. Lockner et al., Cross-validation of modified fatness-specific bioelectrical impedance equations, INT J SP NU, 9(1), 1999, pp. 48-59
Citations number
21
Categorie Soggetti
Ortopedics, Rehabilitation & Sport Medicine
Journal title
INTERNATIONAL JOURNAL OF SPORT NUTRITION
ISSN journal
10501606 → ACNP
Volume
9
Issue
1
Year of publication
1999
Pages
48 - 59
Database
ISI
SICI code
1050-1606(199903)9:1<48:COMFBI>2.0.ZU;2-Y
Abstract
The Segal fatness-specific bioelectrical impedance (BIA) equations are usef ul for predicting fat-free mass (FFM). Stolarczyket al. proposed a modified method of averaging the two equations for individuals who are neither lean nor obese, thus eliminating the need to know % BF a priori. To cross-valid ate this modification, we compared FFM determined using the averaging metho d versus hydrostatic weighing for 76 adults. Per the averaging method, accu racy for males was excellent (r = .91, SEE = 2.7 kg, E = 2.7 kg), with 78% of individuals within +/-3.5% BF predicted by hydrostatic weighing. Accurac y for females was lower (r=.88, SEE=3.0kg,E=3.1kg), with%BFof51% within +/- 3.5% of the reference method. The relative ease and practicality of the ave raging method and the results of this study indicate this method may be use ful with a diverse group.