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Istituto di scienza dell'alimentazione

Torna all'elenco Contributi in rivista anno 2007

Contributo in rivista

Tipo: Articolo in rivista

Titolo: Bioelectrical impedance analysis and age-related differences of body composition in the elderly.

Anno di pubblicazione: 2007

Autori: Guida B; Laccetti R; Gerardi C; Trio R, Perrino NR; Strazzullo P; Siani A; Farinaro E; Colantuoni A

Affiliazioni autori: Department of Neuroscience, Physiology Nutrition Unit, University Federico II, Naples, Italy Department of Clinical and Experimental Medicine, University Federico II, Naples, Italy Epidemiology and Population Genetics, Institute of Food Science, National Research Council, Avellino, Italy Department of Social and Preventive Medicine, University Federico II, Naples, Italy

Autori CNR:


Lingua: inglese

Abstract: BACKGROUND AND AIM: Significant changes in body composition that have important health related effects may occur in the elderly. In this study, we evaluated the bioelectrical characteristics in a large group of apparently healthy Caucasian men in the age range 50-80 years, as a function of age and body mass index. METHODS: We studied 315 men with ages ranging from 50 to 80 years. They were divided into three groups according to body mass index (kg/m(2)): 18.5-24.9 normoweight (NW); 25.0-29.9 overweight (OW); > or =30 obese (OB), and they were classified in nine age subgroups: 50-59 (young-old, YO); 60-69 (old, O); 70-80 (oldest, OS). Fat-free mass, fat mass and body cell mass were investigated using conventional bioelectrical impedance analysis. Body composition was also assessed by bioelectrical impedance vector analysis and the RXc graph method. RESULTS: Body cell mass decreased significantly with age particularly in subgroups of the OW and OB groups (p<0.05). Mean vector displacement followed a definite pattern, with downward migration of the ellipses in the OW and OB groups, after 70 years of age. CONCLUSIONS: Ageing was associated with a pattern of vector bioelectrical impedance analysis indicating decreased soft tissue mass (fat-free mass and body cell mass), particularly in OW and OB-OS healthy men. We suggest 70 years of age as a cut-off for significant quantitative and qualitative (tissue electrical properties) body composition modifications. This bioelectrical impedance vector analysis pattern associated with ageing and across the different body mass index categories, may be useful for clinical purposes and can be used in geriatric routine to accurately assess the body composition modifications occurring in the elderly.

Lingua abstract: inglese

Pagine da: 175

Pagine a: 180


NMCD. Nutrition Metabolism and Cardiovascular Diseases Medikal Press.
Paese di pubblicazione: Italia
Lingua: inglese
ISSN: 0939-4753

Numero volume: 17

DOI: 10.1016/j.numecd.2005.11.001

Referee: Sė: Internazionale

Indicizzato da: ISI Web of Science (WOS) [000246425900002]

Parole chiave:

  • Elderly;Bioelectrical impedance vector analysis; Obesity; Body composition

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