期刊
NUTRITION RESEARCH
卷 54, 期 -, 页码 33-39出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.nutres.2018.03.003
关键词
Adiposity; Fat Mass; Fat-Free Mass; Body Fat Percentage; Bioelectrical Impedance; Validation
Bioimpedance analysis (BIA) and dual energy X-ray absorptiometry (DXA) are commonly utilized for total and segmental body composition assessment, but the agreement between these methods varies. Group (i.e., constant error [CE]) and individual error (i.e., standard error of estimate [SEE] and 95% limits of agreement [LOAs]) of single-frequency BIA were determined in apparently healthy men and women (n = 28 and 45, respectively) when using DXA as a reference method. It was hypothesized that single-frequency BIA would provide lower error for the estimation of total and segmental FFM than FM and BF%. The CE for many of the total and segmental body composition comparisons revealed statistically significant (all P < .05) mean differences (FMTOTAL, FMLEGS, FFMTOTAL, FFMARMS, FFMLEGS, FFMTRUNK, BF%(TOTAL) and BF%(ARMS) for both sexes as well as FMTRUNK and BF%(TRUNK) for women and FMARMS and FMLEGS for men). Although there were significant CEs for many comparisons, the individual error (i.e., SEEs and 95% LOAs) for total and segmental FFM were small whereas FM and BF% were large. Furthermore, the individual error tended to be larger for men than women when estimating FM and BF%, which is likely attributed to the larger segmental mass of men. This finding indicates the agreement between single-frequency BIA and DXA varies based on sex and segmental mass. Consequently, single-frequency BIA can be used for total and segmental FFM, but is not recommended for FM and BF%. (C) 2018 Elsevier Inc. All rights reserved.
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