Skip Navigation

This Article
Right arrow FREE Full Text (PDF) Freely available
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrow Search for citing articles in:
ISI Web of Science (2)
Right arrowRequest Permissions
Right arrow Disclaimer
Google Scholar
Right arrow Articles by CHAPMAN, N. C.
Right arrow Articles by MACLENNAN, W. J.
Right arrow Search for Related Content
PubMed
Right arrow Articles by CHAPMAN, N. C.
Right arrow Articles by MACLENNAN, W. J.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

© 1998 Oxford University Press

research-article

The relationship of anthropometry and bio-electrical impedance to dual-energy X-ray absorptiometry in elderly men and women

NICOLA C. CHAPMAN, ELAINE BANNERMAN, STEPHEN COWEN and WILLIAM J. MACLENNAN

Department of Medicine, Geriatric Medicine Unit The University of Edinburgh, Royal Infirmary of Edinburgh 21 Chalmers Street Edinburgh EH3 9EW, UK

Address correspondence to: W. J. MacLennan. Fax: (+44) 131 536 4536

OBJECTIVE:: evaluation of the accuracy of fat-free mass (FFM) measured by anthropometry or bio-electrical impedance and by dual-energy X-ray absorptiometry (DXA).

METHODS:: 34 subjects (17 males) aged over 75 years, selected from the patients of a group general practice and from a luncheon club and a day centre and all living indepe,ndently at home. FFM was measured by anthropometry (height, demi-span, knee height, weight and triceps skinfold thickness), bio-electrical impedance and DXA.

RESULTS:: An equation for FFM provided by the manufacturer of the bio-electrical impedance analyser gave r2 as 0.900, standard error (SE) as 2.28 kg and systematic overestimate as 6.26 kg. FFM calculated from anthropometry gave an r2 of 0.944, SE of 22.5 kg and a systematic underestimate of 6.26 kg. FFM estimated from height, weight and gender gave an r2 of 0.900, SE of 3.0 and systematic overestimate of 3.0 kg. New equations derived from the data gave a narrower SE for equations derived from bio-electrical impedance (1.2 kg), anthropometry (1.95 kg) and bio-electrical impedance with height, weight and sex (1.45 kg). Substitution of demi-span or knee height for height in equations involving bio-electrical impedance, height, weight and sex gave an r2 of 0.965 and SE of 1.87 for demi-span and an r2 of 0.975 and SE of 1.51 for knee height.

CONCLUSIONS:: by comparing calculations of FFM from bio-electrical impedance and anthropometry and by DXA we have been able to produce equations from anthropometry and bio-electrical impedance which provide a more accurate estimate of FFM in individuals over the age of 75 years.

Keywords: anthropametry, bio-electrical impedance, dual-energy X-ray absorptiometry, fat-free mass, nutritional status

Received April 9, 1997;
Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?




Disclaimer:
Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.