Bioimpedance and Dual-Energy X-ray Absorptiometry Are Not Equivalent Technologies: Comparing Fat Mass and Fat-Free Mass

Bioimpedance (BIA) is the most frequently used technology for body composition assessment at a daily clinical level, mostly due to its low price and user-friendly operation. However, many doubts persist regarding its physiological meaning and applicability. The present study aimed to compare one BIA...

Full description

Saved in:
Bibliographic Details
Published in:International journal of environmental research and public health Vol. 19; no. 21; p. 13940
Main Authors: Lopes, Sofia, Fontes, Tatiana, Tavares, Rejane Giacomelli, Rodrigues, Luis Monteiro, Ferreira-Pêgo, Cíntia
Format: Journal Article
Language:English
Published: Switzerland MDPI AG 27.10.2022
MDPI
Subjects:
Absorptiometry, Photon - methods
Accuracy
Adolescent
Adult
Body composition
Body Composition - physiology
Body fat
Body Mass Index
Caffeine
Cross-Sectional Studies
Electric Impedance
Exercise
Female
Humans
Male
Obesity
Overweight
Physical fitness
Population
Radiation
Sociodemographics
Software
Technology
Values
X-rays
Young Adult
United States > US
Chicago Illinois
bioimpedance
dual-energy X-ray absorptiometry
Fat Free-Mass
DXA
body fat
ISSN:1660-4601, 1661-7827, 1660-4601
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Bioimpedance (BIA) is the most frequently used technology for body composition assessment at a daily clinical level, mostly due to its low price and user-friendly operation. However, many doubts persist regarding its physiological meaning and applicability. The present study aimed to compare one BIA system and the Dual-Energy X-ray Absorptiometry (DXA) for the characterization of body composition in a previously selected cohort of healthy adult participants. A descriptive observational cross-sectional study included a final sample of 121 participants, 93 women and 28 men, with a mean age of 28.26 ± 9.72 years old and a mean body mass index (BMI) of 22.68 ± 3.13 kg/m2. Statistics involved paired t-tests and agreement analysis by the Bland-Altman method. BIA underestimated the percent body fat (%BF) by 5.56% and overestimated Fat-Free Mass (FFM) by 2.90 kg. A strong positive correlation between both technologies was found for FFM (r = 0.980) and the %BF (r = 0.932), but the disagreement was statistically significant (p < 0.001). Although DXA and BIA seem to correlate, these technologies are not congruent. Therefore, the risk of (mis)interpretation and bias is clear with BIA, potentially impacting the nutritional planning of clinical dietitians and the further results of its patients.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
content type line 23
ISSN:1660-4601
1661-7827
1660-4601
DOI:10.3390/ijerph192113940