Development of bioelectrical impedance analysis prediction equations for body composition with the use of a multicomponent model for use in epidemiologic surveys

摘要: Background: Previous studies to develop and validate bioelectrical impedance analysis (BIA) equations predict body composition were limited by small sample sizes, sex specificity, reliance on reference methods that use a 2-component model. Objective: This study was designed sex-specific BIA total water (TBW) fat-free mass (FFM) with the of multicomponent model for children adults. Design: Data from 5 centers pooled create 1474 whites 355 blacks aged 12‐94 y. TBW measured dilution, FFM estimated based densitometry, isotope dual-energy X-ray absorptiometry. Results: The final race-combined prediction included stature 2 /resistance weight (R = 0.84 0.79 root mean square errors 3.8 2.6 L males females, respectively; CV: 8%) tended underpredict in black (2.0 L) females (1.4 overpredict white (0.5 (0.3 L). contained same independent variables 0.90 0.83 3.9 2.9 kg � 6%) (2.1 kg) (1.6 (0.4 kg). Conclusion: These have excellent precision are recommended epidemiologic describe normal levels composition. Am J Clin Nutr 2003;77:331‐40.