The prediction of total body water from bioelectrical impedance in patients with anorexia nervosa
Open accessAbstract
Total body water (TBW) was measured by deuterium oxide (D 2 O) dilution and predicted from bioelectrical impedance (Z) in nineteen anorexic and twenty-seven control women. The equation of Kushner et al.(1992) based on the impedance index (ZI = height 2/Z) gave biases of 0.9 (sd 2.5) and 0.8 (sd 2.5) litres in controls and patients respectively (NS, ANOVA). The ZI-based equation of Deurenberg et al.(1993) gave biases of 1.5 (sd 2.4) litres (NS) and 3.0 (sd 2.1) litres (P<0.001) in controls and patients respectively. Despite the fact that weight was the most powerful predictor of TBW on the study sample (n 46,r2 0.90,P< 0.0001,se of the estimate 1.6 litres, CV 5.7%), the formulas of Segal et al.(1991) and Kushner et al.(1992) based on the association of weight and ZI gave an inaccurate prediction of TBW in both control and anorexic subjects, with a bias ranging from -3.2 (sd 2.4) to 2.9 (sd 2.1) litres (P≤0.001). Population-specific formulas based on ZI (n 46) gave a more accurate prediction of TBW by bioelectrical impedance analysis on the study subjects, with biases of -0.1 (sd 1.8) and 0.5 (sd 1.7) litres in controls and patients respectively (NS). However, the individual bias was sometimes high. It is concluded that bioelectrical impedance analysis can be used to predict TBW in anorexic women at a population level, but the predictions are less good than those based on body weight alone.
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Out of the 16 available equations for people with diseases, eight were developed using segmental technology.
“Out of the 16 available equations, 14 were developed with foot to hand technology [40, 64, 98] and eight using segmental technology [40, 41, 56, 64, 65, 98, 99].”
From High-standard predictive equations for estimating body composition using bioelectrical impedance analysis: a systematic review (2024) · cites this paper as [56]
The Bioelectrical impedance analysis section (page unavailable) describes electrodes placed on the hand and foot, with voltage measured between wrist and ankle—a hand-to-foot setup, not segmental measurement. The paper does not give a count of eight segmental equations; as an example cited for segmental technology, its reported method points the other way. (LLM, conf=0.83)
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Experimental — accuracy not yet measuredRegarding foot-to-hand technology for people with diseases, one equation is for predicting TBW in anorexic females.
“Regarding the foot to hand technology, there is one equation suitable for assessing FFM in overweight and obese postmenopausal females [98], four for appendicular FM and FFM in functionally limited male and female individuals [40], four for assessing FFM in amputee males [41], one for predicting TBW in anorexic females [56], and three for appendicular LSM in frail [64], chronic kidney [65], or hem”
From High-standard predictive equations for estimating body composition using bioelectrical impedance analysis: a systematic review (2024) · cites this paper as [56]
The selected studies on people with diseases included European and Asian male and female participants.
“The selected studies included European [35, 40, 56, 64, 65, 98] and Asian [41, 99] male and female participants.”
From High-standard predictive equations for estimating body composition using bioelectrical impedance analysis: a systematic review (2024) · cites this paper as [56]
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- Authors
- Scalfi, L., Bedogni, G., Marra, M., Di Biase, G., Caldara, A., Severi, S., Contaldo, F., & Battistini, N.
- Affiliations
- University of Naples Federico II (IT)
- University of Modena and Reggio Emilia (IT)
- Federico II University Hospital (IT)
- Venue
- British Journal of Nutrition
- Publisher
- Cambridge University Press (CUP)
- Published
- 1997-09
- Volume
- 78
- Issue
- 3
- Pages
- 357-365
- ISSN
- 0007-1145 (ISSN-L)
- 1475-2662
- OpenAlex
- W2114795915
- Cited by
- 28
- References
- 32
- Citations by year
- 2024: 2 · 2023: 1 · 2022: 1 · 2021: 2 · 2020: 1 · 2018: 2 · 2017: 1
- FWCI
- 1.61
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- British Journal Of Nutrition (publishedVersion)
- PubMed (publishedVersion)
- Archivio istituzionale della ricerca (Alma Mater Studiorum Università di Bologna) (submittedVersion)
- IRIS UNIMORE (University of Modena and Reggio Emilia) (submittedVersion, cc-by)
- Topics
- Health Sciences › Medicine › Physiology › Body Composition Measurement Techniques
- Social Sciences › Psychology › Clinical Psychology › Eating Disorders and Behaviors
- Health Sciences › Nursing › Nutrition and Dietetics › Nutrition, Health and Food Behavior
- Keywords
- total body water, anorexia nervosa, bioelectrical impedance analysis, deuterium dilution, body weight, women, body composition
- MeSH terms
- Adult, Anorexia Nervosa, Body Composition, Body Water, Body Weight, Female, Humans, Radioisotope Dilution Technique, Regression Analysis, Electric Impedance, Deuterium Oxide
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