Assessment of body composition in Sri Lankan children: validation of a bioelectrical impedance prediction equation

摘要: To develop bioelectrical impedance analysis (BIA) equations to predict total body water (TBW) and fat-free mass (FFM) of Sri Lankan children. Data were collected from 5- 15-year-old healthy They randomly assigned validation (M/F: 105/83) cross-validation 53/41) groups. Height, weight BIA measured. TBW was assessed using isotope dilution method (D2O). Multiple regression used preliminary cross-validated on an independent group. Final prediction equation constructed combining the two groups validated by PRESS (prediction sum squares) statistics. Impedance index (height2/impedance; cm2/Ω), sex code (male=1; female=0) as variables. Independent variables final for able 86.3% variance with root means-squared error (RMSE) 2.1 l. statistics 2.1 l press residuals 1.2 l. 86.9% FFM RMSE 2.7 kg. 2.8 kg 1.4 kg. Bland Altman technique showed that majority within mean bias±1.96 s.d. Results this study provide in best our knowledge there are no published South Asian populations. need be affirmed more studies other closely related populations multi-component composition assessment.