Impedance vector distribution by body mass index and conventional bioelectrical impedance analysis in obese women

Guida, Bruna; Trio, Rossella; Pecoraro, Pierluigi; Gerardi, MC; Laccetti, Roberta; Nastasi, A; Falconi, C

doi:10.1016/s0939-4753(03)80021-2

Cited by 32 publications

(28 citation statements)

References 23 publications

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“…Because the highest BMI of our women was one of 48.2 kg/ m 2 , we cannot exclude that an expansion of ECW : TBW may occur at higher levels of class III obesity as compared to class I and II obesity (Mazariegos et al, 1992;Guida et al, 2003). However, as far as values of BMI up to 48.2 kg/m 2 are considered, ECW : TBW appears to be the same in class I-II and class III obese women.…”

Section: Discussionmentioning

confidence: 94%

Body water distribution in severe obesity and its assessment from eight-polar bioelectrical impedance analysis

et al. 2004

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Objective: To measure body water distribution and to evaluate the accuracy of eight-polar bioelectrical impedance analysis (BIA) for the assessment of total body water (TBW) and extracellular water (ECW) in severe obesity. Design: Cross-sectional study. Setting: Obesity clinic. Subjects: In all, 75 women aged 18-66 y, 25 with body mass index (BMI) between 19.1 and 29.9 kg/m 2 (ie not obese), 25 with BMI between 30.0 and 39.9 kg/m 2 (ie class I and II obese), and 25 with BMI between 40.0 and 48.2 kg/m 2 (ie class III obese). Methods: TBW and ECW were measured by 2 H 2 O and Br dilution. Body resistance (R) was obtained by summing the resistances of arms, trunk and legs as measured by eight-polar BIA (InBody 3.0, Biospace, Seoul, Korea). The resistance index at a frequency of x kHz (RI x ) was calculated as height 2 /R x . Results: ECW : TBW was similar in women with class III (4673%, mean7s.d.) and class I-II obesity (4573%) but higher than in nonobese women (3973%, Po0.05). In a random subsample of 37 subjects, RI 500 explained 82% of TBW variance (Po0.0001) and cross-validation of the obtained algorithm in the remaining 38 subjects gave a percent root mean square error (RMSE%) of 5% and a pure error (PE) of 2.1 l. In the same subjects, RI 5 explained 87% of ECW variance (Po0.0001) and cross-validation of the obtained algorithm gave a RMSE% of 8% and a PE of 1.4 l. The contribution of weight and BMI to the prediction of TBW and ECW was nil or negligible on practical grounds. Conclusions: ECW : TBW is similar in women with class I-II and class III obesity up to BMI values of 48.2 kg/m 2 . Eight-polar BIA offers accurate estimates of TBW and ECW in women with a wide range of BMI (19.1-48.2 kg/m 2 ) without the need of population-specific formulae. Sponsorship: Progetti di Ricerca Corrente, Istituto Auxologico Italiano.

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Section: Discussionmentioning

confidence: 94%

Body water distribution in severe obesity and its assessment from eight-polar bioelectrical impedance analysis

et al. 2004

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“…We may assume from these data, that the PLA group presented a slightly higher adiposity. It is known that the higher the adiposity, the lower the hydration [33], and therefore we can hypothesize that as SYN supplementation maintained the hydration status, it impaired or reduced fat gain. We must remember that fat gain is very common during the aging process, and is one of the factors associated with sarcopenic obesity [31].…”

Section: Discussionmentioning

confidence: 99%

Effects of Three-Month Intake of Synbiotic on Inflammation and Body Composition in the Elderly: A Pilot Study

2013

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We hypothesize that improvements in the gut microbiota are capable of ameliorating gut permeability and, consequently, reducing systemic inflammation and the risk of frailty. This study aims to evaluate some effects of synbiotic supplementation on inflammatory markers and the body composition of the elderly at risk of frailty. In a double-blind study that lasted three months, 17 elderly individuals fulfilling one frailty criteria (grip strength) were randomly distributed into two groups: SYN (n = 9), daily intake of synbiotic (6 g Frutooligossacarides, 108 to 109 CFU Lactobacillus paracasei, 108 to 109 CFU Lactobacillus rhamnosus, 108 to 109 CFU Lactobacillus acidophilus and 108 to 109 CFU Bifidobacterium lactis), or placebo (maltodextrin; PLA; n = 8). Subjects were analyzed for anthropometric measurements, bioelectric impedance with vectorial analysis (BIVA), IL-6 and TNF-α. A comparison between groups did not show any difference for the variables investigated. In turn, individual analysis of electrical impedance (BIVA) demonstrated that the majority of SYN individuals maintained or improved their tissue hydration, when compared to the PLA group after supplementation. In conclusion, three months of synbiotic supplementation did not promote any significant changes in inflammatory cytokines or body composition, but demonstrated a trend towards a preservation of hydration status in apparently healthy elderly individuals.

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“…In this regard, different complex equations using abdominal circumference to estimate BF, have been validated for obese men and women (14, 15). Likewise, the use of a more refined method, such as BIA, requires an assumption that the degree of hydration and bone mineral content are stable, but such an assumption is not valid for obese individuals (16, 17). In an attempt to overcome these limitations, circumferences, SKF, and BIA vectors measures of nondialyzed CKD patients were used in specific validated equations for patients with normal BMI, overweight, and obesity (11).…”

Section: Introductionmentioning

confidence: 99%

Body adiposity index assess body fat with high accuracy in nondialyzed chronic kidney disease patients

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Vale

Lemos

et al. 2013

Obesity

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Impedance vector distribution by body mass index and conventional bioelectrical impedance analysis in obese women

Cited by 32 publications

References 23 publications

Body water distribution in severe obesity and its assessment from eight-polar bioelectrical impedance analysis

Body water distribution in severe obesity and its assessment from eight-polar bioelectrical impedance analysis

Effects of Three-Month Intake of Synbiotic on Inflammation and Body Composition in the Elderly: A Pilot Study

Body adiposity index assess body fat with high accuracy in nondialyzed chronic kidney disease patients

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