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Comparison of Whole Body and Segmental Bioimpedance Methodologies for Estimating Total Body Water
Author(s) -
WOTTON M. J.,
THOMAS B. J.,
CORNISH B. H.,
WARD L. C.
Publication year - 2000
Publication title -
annals of the new york academy of sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.712
H-Index - 248
eISSN - 1749-6632
pISSN - 0077-8923
DOI - 10.1111/j.1749-6632.2000.tb06444.x
Subject(s) - bioelectrical impedance analysis , body water , dilution , body fluid , medicine , body weight , body mass index , physics , thermodynamics
A bstract : We compared the whole body (WB) and segmental bioelectrical impedance analysis (BIA) methodologies in a group of healthy adults ( n = 25 ). It has been suggested that the segmental methodology may overcome the difficulty in generating a single algorithm to predict total body water (TBW) in all groups whether healthy or not. We measured TBW, using D 2 O dilution, and WB and segmental BIA parameters. Cole‐Cole analysis was used to determine the impedance at the characteristic frequency ( Z c ). The correlation between TBW (by D 2 O dilution) and segmental BIA measures (multiple regression, r = 0.90 , p < 0.001 , SEE = 3.1 L) was not significantly higher than the correlation between TBW (D 2 O dilution) and WB BIA measures (simple regression, r = 0.85 , p < 0.001 , SEE = 3.6 L). Others have observed this “lack of improvement” in a group of healthy subjects. The true value of the segmental BIA methodology may lie in applications involving groups with altered distributions of segmental and compartmental fluid.