naa a22 4500 510785867 CHVBK 20180411083302.0 cr unu---uuuuu 180411e20130601xx s 000 0 eng 10.1007/s12603-012-0411-7 doi (NATIONALLICENCE)springer-10.1007/s12603-012-0411-7 Efficacy of specific bioelectrical impedance vector analysis (BIVA) for assessing body composition in the elderly [Elektronische Daten] [Elisabetta Marini, G. Sergi, V. Succa, B. Saragat, S. Sarti, A. Coin, E. Manzato, R. Buffa] Objectives: This study aimed to ascertain the efficacy of bioelectrical impedance vector analysis (BIVA) in assessing body composition in the elderly by comparing findings with the results of dual-energy X-ray absorptiometry (DXA), and to test an analytical variant of the method (specific BIVA). Design: Cross-sectional study. Participants: The sample comprised 207 free-living elderly individuals (75 men and 132 women) aged 65 to 93 years. Measurements: Anthropometric and bioelectrical measurements were taken according to standard criteria. BIVA was applied using the ‘classic' procedure and correcting bioelectrical values for body geometry to obtain an estimate of the whole-body impedivity. DXA was used as a reference body composition assessment method. BIVA (classic and specific values) and DXA findings were compared using Student's t and Hotelling's T2 tests, and Pearson's correlation coefficient. Results: In both sexes, BIVA distinguished between individuals with different amounts of fat and fat-free mass (lean mass including bone mineral content), according to DXA, but not between those with different proportions of fat mass (FM%). Specific bioelectrical values detected changes in body composition. Conclusion: BIVA should be used with caution for evaluating body composition in the elderly. Specific bioelectrical values proved effective, showing promise as a methodological variant of BIVA, suitable for identifying age-related changes in body fatness. Serdi and Springer-Verlag France, 2012 Body composition nationallicence aging nationallicence impedivity nationallicence BIVA nationallicence DXA nationallicence BIVA : Bioelectrical Impedance Vector Analysis nationallicence DXA : dual-energy X-ray absorptiometry nationallicence R : Resistance nationallicence Xc : Reactance nationallicence Z : Impedance nationallicence Marini Elisabetta Department of Environmental and Life Sciences, University of Cagliari, Cagliari, Italy aut Sergi G. Department of Medical and Surgical Sciences, Division of Geriatrics, University of Padua, Padua, Italy aut Succa V. Department of Environmental and Life Sciences, University of Cagliari, Cagliari, Italy aut Saragat B. Department of Environmental and Life Sciences, University of Cagliari, Cagliari, Italy aut Sarti S. Department of Medical and Surgical Sciences, Division of Geriatrics, University of Padua, Padua, Italy aut Coin A. Department of Medical and Surgical Sciences, Division of Geriatrics, University of Padua, Padua, Italy aut Manzato E. Department of Medical and Surgical Sciences, Division of Geriatrics, University of Padua, Padua, Italy aut Buffa R. Department of Environmental and Life Sciences, University of Cagliari, Cagliari, Italy aut The journal of nutrition, health & aging Springer Paris 17/6(2013-06-01), 515-521 1279-7707 17:6<515 2013 17 12603 https://doi.org/10.1007/s12603-012-0411-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12603-012-0411-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Marini Elisabetta Department of Environmental and Life Sciences, University of Cagliari, Cagliari, Italy aut NATIONALLICENCE 700 1- Sergi G. Department of Medical and Surgical Sciences, Division of Geriatrics, University of Padua, Padua, Italy aut NATIONALLICENCE 700 1- Succa V. Department of Environmental and Life Sciences, University of Cagliari, Cagliari, Italy aut NATIONALLICENCE 700 1- Saragat B. Department of Environmental and Life Sciences, University of Cagliari, Cagliari, Italy aut NATIONALLICENCE 700 1- Sarti S. Department of Medical and Surgical Sciences, Division of Geriatrics, University of Padua, Padua, Italy aut NATIONALLICENCE 700 1- Coin A. Department of Medical and Surgical Sciences, Division of Geriatrics, University of Padua, Padua, Italy aut NATIONALLICENCE 700 1- Manzato E. Department of Medical and Surgical Sciences, Division of Geriatrics, University of Padua, Padua, Italy aut NATIONALLICENCE 700 1- Buffa R. Department of Environmental and Life Sciences, University of Cagliari, Cagliari, Italy aut NATIONALLICENCE 773 0- The journal of nutrition, health & aging Springer Paris 17/6(2013-06-01), 515-521 1279-7707 17:6<515 2013 17 12603 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer