scholarly journals Bioelectric impedance spectroscopy underestimates fat-free mass compared to dual energy X-ray absorptiometry in incurable cancer patients

2008 ◽  
Vol 63 (6) ◽  
pp. 794-801 ◽  
Author(s):  
L H Ellegård ◽  
M Åhlén ◽  
U Körner ◽  
K G Lundholm ◽  
L D Plank ◽  
...  
Keyword(s):  
Impedance Spectroscopy ◽  
Cancer Patients ◽  
Dual Energy ◽  
Fat Free Mass ◽  
Incurable Cancer ◽  
X Ray ◽  
Bioelectric Impedance

scholarly journals Body fat and fat-free mass measured by bioelectric impedance spectroscopy and dual-energy X-ray absorptiometry in obese and non-obese adults

2011 ◽  
Vol 107 (8) ◽  
pp. 1192-1200 ◽  
Author(s):  
Paula Berstad ◽  
Anna Randby ◽  
Gunn Seim Ekeland ◽  
Hege Ulveland ◽  
Torbjørn Omland ◽  
...  
Keyword(s):  
Impedance Spectroscopy ◽  
Body Fat ◽  
Individual Variation ◽  
Dual Energy ◽  
Normal Weight ◽  
Mean Difference ◽  
Fat Free Mass ◽  
Single Individual ◽  
X Ray ◽  
Bioelectric Impedance

The aim of the present study was to compare body fat mass (FM) and fat-free mass (FFM) estimates by bioelectric impedance spectroscopy (BIS), with respective estimates by dual-energy X-ray absorptiometry (DXA), in obese and non-obese subjects. Body composition was measured in ninety-three obese and non-obese men and women by BIS device, BodyScout (Fresenius Kabi, Bad Homburg, Germany) and DXA device, Lunar iDXA (GE Healthcare, Madison, WI, USA). Mean difference between the methods was analysed by t tests, and Bland–Altman plots were generated to further examine the differences between the methods. Mean difference between the estimates by DXA and BIS (ΔDXA − BIS and Bland–Altman 95 % limits of agreement) were as follows: FM 4·1 ( − 2·9, 11·2) kg and 4·5 ( − 2·9, 11·8) %, FFM − 4·1 ( − 11·2, 2·9) kg and − 4·5 ( − 11·9, 2·9) %, indicating large inter-individual variation and statistically significant underestimation of FM and overestimation of FFM by BIS, as compared to DXA. The underestimation of FMkg (FM measured in kg) and overestimation of FFMkg (FFM measured in kg) were more pronounced in men than in women, and the underestimation of FM% (FM measured in percent) and overestimation of FFM% (FFM measured in percent) were more pronounced in normal weight (BMI = 20·0–24·9 kg/m2) than in overweight and obese (BMI ≥ 25·0 kg/m2) subjects. BIS may be suitable for classification of a population into groups according to FM and FFM. However, the large inter-individual variation suggests that this BIS device with the proprietary software is insufficient for estimation of single individual body FM and FFM.

Preoperative and postoperative agreement in fat free mass (FFM) between bioelectrical impedance spectroscopy (BIS) and dual-energy X-ray absorptiometry (DXA) in patients undergoing cardiac surgery

2010 ◽  
Vol 29 (6) ◽  
pp. 789-794 ◽  
Author(s):  
Lenny M.W. van Venrooij ◽  
Hein J. Verberne ◽  
Rien de Vos ◽  
Mieke M.M.J. Borgmeijer-Hoelen ◽  
Paul A.M. van Leeuwen ◽  
...  
Keyword(s):  
Cardiac Surgery ◽  
Impedance Spectroscopy ◽  
Bioelectrical Impedance ◽  
Dual Energy ◽  
Fat Free Mass ◽  
X Ray

QDR 4500A DXA overestimates fat-free mass compared with criterion methods

2003 ◽  
Vol 94 (3) ◽  
pp. 959-965 ◽  
Author(s):  
Frances Tylavsky ◽  
Timothy Lohman ◽  
Barbara A. Blunt ◽  
Dale A. Schoeller ◽  
Thomas Fuerst ◽  
...  
Keyword(s):  
Lower Estimate ◽  
Dual Energy ◽  
Fat Free Mass ◽  
Component Model ◽  
Men And Women ◽  
Hydration Level ◽  
X Ray ◽  
Beam System ◽  
Four Component Model ◽  
Total Body

This study evaluated the accuracy with which the dual-energy X-ray absorptiometer (Hologic QDR 4500A) measured fat-free mass (FFM), fat mass (FM), and hydration of FFM. In a study of 58 men and women (ages 70–79 yr), the QDR 4500A was found to provide a systematically higher estimate of FFM and lower estimate of FM than a four-component model of body composition. A correction factor from this study was developed and applied to two other samples ( n = 13 and 37). We found mean corrected levels of FFM and FM to be equivalent to that obtained by the four-component model or total body water. In addition, the hydration of the corrected FFM was closer to the established hydration level in adult samples and that obtained from the four-component model. These findings suggest that the current calibration of the fan-beam system of the Hologic QDR 4500A provides an overestimate of FFM and underestimate of FM compared with reference methods.

Fat-free mass and fat mass reference values by dual-energy X-ray absorptiometry (DEXA) in a 20–80 year-old Italian population

2008 ◽  
Vol 27 (1) ◽  
pp. 87-94 ◽  
Author(s):  
Alessandra Coin ◽  
Giuseppe Sergi ◽  
Nadia Minicuci ◽  
Sandro Giannini ◽  
Elisa Barbiero ◽  
...  
Keyword(s):  
Fat Mass ◽  
Reference Values ◽  
Dual Energy ◽  
Fat Free Mass ◽  
Italian Population ◽  
X Ray

scholarly journals Fat and Fat-Free Mass of Preterm and Term Infants from Birth to Six Months: A Review of Current Evidence

Nutrients ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 288 ◽  
Author(s):  
Constanze Hamatschek ◽  
Efrah I. Yousuf ◽  
Lea Sophie Möllers ◽  
Hon Yiu So ◽  
Katherine M. Morrison ◽  
...  
Keyword(s):  
Preterm Infants ◽  
Fat Mass ◽  
Infant Nutrition ◽  
Dual Energy ◽  
Fat Free Mass ◽  
Current Evidence ◽  
Term Infants ◽  
Air Displacement Plethysmography ◽  
X Ray ◽  
Postmenstrual Age

To optimize infant nutrition, the nature of weight gain must be analyzed. This study aims to review publications and develop growth charts for fat and fat-free mass for preterm and term infants. Body composition data measured by air displacement plethysmography (ADP) and dual energy X-ray absorptiometry (DXA) in preterm and term infants until six months corrected age were abstracted from publications (31 December 1990 to 30 April 2019). Age-specific percentiles were calculated. ADP measurements were used in 110 studies (2855 preterm and 22,410 term infants), and DXA was used in 28 studies (1147 preterm and 3542 term infants). At term age, preterm infants had higher percent-fat than term-born infants (16% vs. 11%, p < 0.001). At 52 weeks postmenstrual age (PMA), both reached similar percent-fat (24% vs. 25%). In contrast, at term age, preterm infants had less fat-free mass (2500 g vs. 2900 g) by 400 g. This difference decreased to 250 g by 52 weeks, and to 100 g at 60 weeks PMA (5000 g vs. 5100 g). DXA fat-free mass data were comparable with ADP. However, median percent-fat was up to 5% higher with DXA measurements compared with ADP with PMA > 50 weeks. There are methodological differences between ADP and DXA measures for infants with higher fat mass. The cause of higher fat mass in preterm infants at term age needs further investigation.

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