Prediction of fat-free body mass from bioelectrical impedance and anthropometry among 3-year-old children using DXA.
For 3-year-old children suitable methods to estimate body composition are sparse. We aimed to develop predictive equations for estimating fat-free mass (FFM) from bioelectrical impedance (BIA) and anthropometry using dual-energy X-ray absorptiometry (DXA) as reference method using data from 99 healthy 3-year-old Danish children. Predictive equations were derived from two multiple linear regression models, a comprehensive model (height(2)/resistance (RI), six anthropometric measurements) and a simple model (RI, height, weight). Their uncertainty was quantified by means of 10-fold cross-validation approach. Prediction error of FFM was 3.0% for both equations (root mean square error: 360 and 356 g, respectively). The derived equations produced BIA-based prediction of FFM and FM near DXA scan results. We suggest that the predictive equations can be applied in similar population samples aged 2-4 years. The derived equations may prove useful for studies linking body composition to early risk factors and early onset of obesity.
Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, 1958 Frederiksberg, Denmark (KTE, SMJ, LBC, CR, KFM, CM).
Katrine T
KT
Ejlerskov
Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, 1958 Frederiksberg, Denmark (KTE, SMJ, LBC, CR, KFM, CM).
Signe M
SM
Jensen
Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, 1958 Frederiksberg, Denmark (KTE, SMJ, LBC, CR, KFM, CM).
Line B
LB
Christensen
Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, 1958 Frederiksberg, Denmark (KTE, SMJ, LBC, CR, KFM, CM).
Christian
C
Ritz
Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, 1958 Frederiksberg, Denmark (KTE, SMJ, LBC, CR, KFM, CM).
Kim F
KF
Michaelsen
Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, 1958 Frederiksberg, Denmark (KTE, SMJ, LBC, CR, KFM, CM).
Christian
C
Mølgaard
D015502:Absorptiometry, Photon / Q000379:methods*; D000273:Adipose Tissue; D000886:Anthropometry; D001823:Body Composition; D002675:Child, Preschool; D017097:Electric Impedance; D005260:Female; D006801:Humans; D008297:Male