Prediction of Fatness by Standing 8‐Electrode Bioimpedance: A Multiethnic Adolescent Population

摘要: The objective of this study was to validate an 8-electrode bioimpedance analysis (BIA8) device (BC-418; Tanita, Tokyo, Japan) for use in populations European, Maori, Pacific Island, and Asian adolescents. Healthy adolescents (215 M, 216 F; 129 120 Asian, 91 European; age range 12–19 years) were recruited by purposive sampling high schools Auckland, New Zealand. Weight, height, sitting leg length, waist circumference, whole-body impedance measured. Fat mass (FM) fat-free (FFM) derived from the BIA8 manufacturer's equations compared with measurements dual-energy X-ray absorptiometry (DXA). DXA-measured FFM used as reference develop prediction based on impedance. A double cross-validation technique applied. underestimated FM 2.06 kg (P < 0.0001) percent body fat (%BF) 2.84% 0.0001), average. However, tended overestimate %BF lean underestimate individuals. Sex-specific developed showed acceptable accuracy cross-validation. In total sample, best were, boys: (kg) = 0.607 height (cm)2/impedance (Ω) + 1.542 (y) 0.220 (cm) 0.096 weight 1.836 ethnicity (0 European or 1 Maori Pacific) − 47.547, R2 0.93, standard error estimate (SEE) 3.09 kg; and, girls: 0.531 0.182 1.562 non-Pacific, 15.782, 0.91, SEE 2.19 kg. conclusion, fatness estimation using our sample perform better than reliance estimates. relationship between BIA composition is dependent.