摘要:Aim. To develop and cross-validate a predictive equation for estimating lean body mass(LBM) in children, based on bioelectrical impedance analysis (BIA) and anthropometricparameters, and to compare our equation with other predictive methods.Methods. We evaluated body composition of 155 children (age 5-14 years) by BIA anddual energy X-ray absorptiometry (DXA). Children were divided in two groups: developingset and cross-validation set. Statistical analysis as multiple regression and Bland-Altman methods were performed.Results. From developing set (105 children) a predictive LBM (kg) equation was created.From the cross-validated set (35 children), our equation was seen to agree withLBM (kg) by DXA. On the contrary, LBM predicted by Schaefer’s equation and BIA didnot agree with the criterion measure.Conclusions. This cross-validated equation can be useful in epidemiological studies andalso in clinical practice, permitting a better definition and follow up of children’s bodycomposition.
关键词:children; predictive equation; lean body mass; body composition; dual energy X-ray;absorptiometry