Body composition in the elderly: Reference values and bioelectrical impedance spectroscopy to predict total body skeletal muscle mass

Tengvall, Marja,1982Gothenburg University,Göteborgs universitet,Institutionen för medicin, avdelningen för klinisk näringslära,Institute of Medicine, Department of Clinical Nutrition,University of Gothenburg (author)

BACKGROUND & AIMS: To validate the bioelectrical impedance spectroscopy (BIS) model against dual-energy X-ray absorptiometry (DXA), to develop and compare BIS estimates of skeletal muscle mass (SMM) to other prediction equations, and to report BIS reference values of body composition in a population-based sample of 75-year-old Swedes. METHODS: Body composition was measured by BIS in 574 subjects, and by DXA and BIS in a subset of 98 subjects. Data from the latter group was used to develop BIS prediction equations for total body skeletal muscle mass (TBSMM). RESULTS: Average fat free mass (FFM) measured by DXA and BIS was comparable. FFM(BIS) for women and men was 40.6kg and 55.8kg, respectively. Average fat free mass index (FFMI) and body fat index (BFI) for women were 15.6 and 11.0. Average FFMI and BFI for men were 18.3 and 8.6. Existing bioelectrical impedance analysis equations to predict SMM were not valid in this cohort. A TBSMM prediction equation developed from this sample had an R(pred)(2) of 0.91, indicating that the equation would explain 91% of the variability in future observations. CONCLUSIONS: BIS correctly estimated average FFM in healthy elderly Swedes. For prediction of TBSMM, a population specific equation was required.

Ellegård, Lars,1958Gothenburg University,Göteborgs universitet,Institutionen för medicin, avdelningen för klinisk näringslära,Institute of Medicine, Department of Clinical Nutrition,University of Gothenburg(Swepub:gu)xellla (author)
Malmros, VibekeGothenburg University,Göteborgs universitet,Institutionen för medicin, avdelningen för klinisk näringslära,Institute of Medicine, Department of Clinical Nutrition,University of Gothenburg(Swepub:gu)xmalvi (author)
Bosaeus, Niklas,1982Gothenburg University,Göteborgs universitet,Institutionen för medicin, avdelningen för klinisk näringslära,Institute of Medicine, Department of Clinical Nutrition,University of Gothenburg(Swepub:cth)kb01boni (author)
Lissner, Lauren,1956Gothenburg University,Göteborgs universitet,Institutionen för medicin, avdelningen för samhällsmedicin och folkhälsa,Institute of Medicine, School of Public Health and Community Medicine,University of Gothenburg(Swepub:gu)xlisla (author)
Bosaeus, Ingvar,1950Gothenburg University,Göteborgs universitet,Institutionen för medicin, avdelningen för klinisk näringslära,Institute of Medicine, Department of Clinical Nutrition,University of Gothenburg(Swepub:gu)xbosin (author)
Göteborgs universitetInstitutionen för medicin, avdelningen för klinisk näringslära (creator_code:org_t)

By the author/editor: Tengvall, Marja, ...; Ellegård, Lars, ...; Malmros, Vibeke; Bosaeus, Niklas, ...; Lissner, Lauren, ...; Bosaeus, Ingvar, ...

About the subject

MEDICAL AND HEALTH SCIENCES: MEDICAL AND HEAL ...; and Health Sciences; and Public Health Gl ...

By the university: University of Gothenburg; Chalmers University of Technology

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