Fat-free mass by bioelectrical impedance Vs dual-energy X-ray absorptiometry (DXA)

Lorenzo, Antonino De; Sorge, S.P.; Iacopino, L; Andréoli, A.; Luca, P. Petrone De; Sasso, G F

doi:10.1016/s0969-8043(97)00099-7

Cited by 60 publications

(52 citation statements)

References 6 publications

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“…It is worth noticing that the height as estimated from the equation used in this study 14 was used to calculate the fat-free mass suggested by Rabito et al 22 . Those authors observed a coefficient of determination equal to 0.88 and considered this value between very good and excellent 28 , suggesting that it was a valid strategy to apply this formula to all subjects (including those that could stand up for measurement of height).…”

Section: Discussionmentioning

confidence: 99%

“…The exam was performed in the supine position and the subjects received standardized recommendations: 1) no alcohol consumption or exercise within 24 hours prior to the test; 2) no caffeine or food consumption for four hours prior to the test; 3) the consumption of two-four glasses of water within the two hours prior to the test; 4) bathroom use within the 30 minutes prior to the assessment. Resistance and reactance values provided by the analyzer were used to estimate the fat-free mass (kg), in a child-specific equation 14,15 Additionally, body mass index (BMI = W/H 2 ), fat-free mass index (FFMI = FFM/H 2 ) and fat mass index (FMI = FM/H 2 ) were calculated as previously described 11 .…”

Section: Bioelectrical Impedancementioning

confidence: 99%

“…Among the methods used to evaluate body composition in children, bioelectrical impedance stands out as a noninvasive and painless method, which has already been adopted by other authors while evaluating SMA patients 13 , or children and adolescents without the disease [14][15][16] . Body girth measurements are frequently used in clinical practice 17,18 due to their practical character and low price.…”

Section: Introductionmentioning

confidence: 99%

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Body Composition and Chest Expansion of Type II and III Spinal Muscular Atrophy Patients

Mainenti

Sousa

Dias

et al. 2013

J. Hum. Growth Dev.

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Introduction: spinal muscular atrophy patients present muscle weakness, orthopedic problems, nutritional complications and respiratory impairment. Lean mass and fat mass modifications are also expected in this population. Objective: to verify the body composition and chest expansion of type II and III spinal muscular atrophy patients. Methods: fourteen individuals were evaluated: seven patients in Group I of 9 (7-12) years of age, weighing 29.7 (23.5-60.0) kg; and seven children without the disease in Group II of 9 (9-12) years, weighing 31.0 (27.8-54.1) kg. Patients' monofrequency bioelectrical impedance was used for analyze body composition. Chest, hip and abdominal girths were measured by a flexible steel tape. The SPSS program was used to statistical analysis (p < 0.05). Results: patients presented higher impedance: 1416.9 (850.5-1559.1) vs 788.0 (683.6-853.8), P < 0.05; and fat percentage: 31.2 (23.9-46.6) vs 19.1 (14.9-27.0)%, P < 0.05. The difference between forced inspiration and forced expiration thorax girth was smaller for patients when comparing to Group II: 3.0 (0.8-4.4) vs. 5.0 (3.9-6.5) cm, P<0.05. Conclusions: patients with spinal muscular atrophy presented higher adiposity and lower chest expansion.

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Section: Discussionmentioning

confidence: 99%

Section: Bioelectrical Impedancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Body Composition and Chest Expansion of Type II and III Spinal Muscular Atrophy Patients

Mainenti

Sousa

Dias

et al. 2013

J. Hum. Growth Dev.

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“…FFM was further calculated directly from the impedance index (ZI) as described by Kushner et al 23 . The ZI was then used to calculate FFM, using three different equations [1][2][3] that were derived from children with a similar age range as our study group (Table 1).…”

Section: Body Compositionmentioning

confidence: 99%

A Bedside Measure of Body Composition in Duchenne Muscular Dystrophy

Elliott

Davidson

Davies

et al. 2015

Pediatric Neurology

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Introduction:In clinical practice, monitoring body composition is a critical component of nutritional assessment and weight management in boys with Duchene muscular dystrophy (DMD). We aimed to evaluate the accuracy of a simple bedside measurement tool for body composition, namely bioelectrical impedance analysis (BIA), in boys with DMD. Methods:Measures of fat free mass (FFM) were determined using a BIA machine and compared against estimations obtained from a reference body composition model. Additionally, the use of raw impedance values were analysed using three existing predictive equations 1-3 for the estimation of FFM. Accuracy of BIA was assessed by comparison against the reference model by calculation of biases and limits of agreement.Results: Body composition was measured in ten boys with DMD, mean age 9.01 ± 2.34 years. The BIA machine values of FFM were on average 2.3 ± 14.1 kg higher than reference values. Limits of agreement (based on 95 % CI of the mean) were -7.4 to 2.9 kg. There was a significant correlation between the mean FFM and difference in FFM between the BIA machine and the reference model (r = -0.86, p= 0.02) suggesting that the bias was not consistent across the range of measurements. The most accurate predictive equation for the estimation of FFM using raw impedance values was Pietrobelli's 3 ; mean difference -0.7 kg, 95 % limits of agreement (-3.5 to 2.0 kg). Conclusion:In a clinical setting, where a rapid assessment of body composition is advantageous, the use of raw impedance values, combined with the Pietrobelli 3 equation, is recommended for the accurate estimation of FFM, in boys with DMD.

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“…Using these criteria we identified four algorithms for testing in the KISS population (de Lorenzo et al, 1998;Bedogni et al, 2002;Pietrobelli et al, 2003;Nielsen et al, 2007).…”

Section: Choice Of External Bia Algorithms For Cross-validationmentioning

confidence: 99%

Cross-validation of bioelectrical impedance analysis for the assessment of body composition in a representative sample of 6- to 13-year-old children

et al. 2008

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Background/Objectives: (1) To cross-validate tetra-(4-BIA) and octopolar (8-BIA) bioelectrical impedance analysis vs dualenergy X-ray absorptiometry (DXA) for the assessment of total and appendicular body composition and (2) to evaluate the accuracy of external 4-BIA algorithms for the prediction of total body composition, in a representative sample of Swiss children. Subjects/Methods: A representative sample of 333 Swiss children aged 6-13 years from the Kinder-Sportstudie (KISS) (ISRCTN15360785). Whole-body fat-free mass (FFM) and appendicular lean tissue mass were measured with DXA. Body resistance (R) was measured at 50 kHz with 4-BIA and segmental body resistance at 5, 50, 250 and 500 kHz with 8-BIA. The resistance index (RI) was calculated as height 2 /R. Selection of predictors (gender, age, weight, RI4 and RI8) for BIA algorithms was performed using bootstrapped stepwise linear regression on 1000 samples. We calculated 95% confidence intervals (CI) of regression coefficients and measures of model fit using bootstrap analysis. Limits of agreement were used as measures of interchangeability of BIA with DXA. Results: 8-BIA was more accurate than 4-BIA for the assessment of FFM (root mean square error (RMSE) ¼ 0.90 (95% CI 0.82-0.98) vs 1.12 kg (1.01-1.24); limits of agreement 1.80 to -1.80 kg vs 2.24 to -2.24 kg). 8-BIA also gave accurate estimates of appendicular body composition, with RMSE p0.10 kg for arms and p0.24 kg for legs. All external 4-BIA algorithms performed poorly with substantial negative proportional bias (rX0.48, Po0.001). Conclusions: In a representative sample of young Swiss children (1) 8-BIA was superior to 4-BIA for the prediction of FFM, (2) external 4-BIA algorithms gave biased predictions of FFM and (3) 8-BIA was an accurate predictor of segmental body composition.

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Fat-free mass by bioelectrical impedance Vs dual-energy X-ray absorptiometry (DXA)

Cited by 60 publications

References 6 publications

Body Composition and Chest Expansion of Type II and III Spinal Muscular Atrophy Patients

Body Composition and Chest Expansion of Type II and III Spinal Muscular Atrophy Patients

A Bedside Measure of Body Composition in Duchenne Muscular Dystrophy

Cross-validation of bioelectrical impedance analysis for the assessment of body composition in a representative sample of 6- to 13-year-old children

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