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Dual energy X-ray absorptiometry body composition and aging in a population-based older cohort.
Int J Obes (Lond). 2007 Feb; 31(2):279-84.IJ

Abstract

OBJECTIVE

The aims of this cross-sectional study were (1) to examine the effect of age on body composition in older adults using dual-energy X-ray absorptiometry (DXA) and (2) to evaluate the agreement of DXA with standard indirect anthropometric measures (body mass index (BMI), waist circumference and waist-to-hip ratio (WHR)).

RESEARCH METHODS AND PROCEDURES

A population-based sample of 731 adults aged between 50 and 79 years underwent measurement of BMI, waist circumference, WHR, DXA total body fat mass, DXA % total body fat, DXA % trunk fat and DXA lean body mass. Linear regression was used to test for trend in measures of body composition between age categories in men and women. Partial correlations and Bland-Altman analysis were used to examine the agreement of DXA measures with indirect measures.

RESULTS

DXA lean body mass decreased significantly with increasing age in both sexes (P<0.05). In males, BMI (P=0.01) and body weight (P<0.01) decreased with age, and in females, WHR (P=0.05), DXA % total fat (P=0.02) and DXA % trunk fat (P=0.05) increased with age. There was good agreement between DXA measures of fatness and indirect anthropometric measures, except for WHR, which showed greater variability in its comparisons with DXA.

CONCLUSION

Using the highly sensitive and direct DXA method of measuring body composition, a decline in lean body mass and an increase in adiposity was observed with aging. Except for WHR, indirect anthropometric measures generally showed high levels of agreement with DXA fat measures in this older cohort.

Authors+Show Affiliations

Menzies Research Institute, University of Tasmania, Hobart, Tasmania, Australia. kelly.shaw@dhhs.tas.gov.auNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Validation Study

Language

eng

PubMed ID

16788568

Citation

Shaw, K A., et al. "Dual Energy X-ray Absorptiometry Body Composition and Aging in a Population-based Older Cohort." International Journal of Obesity (2005), vol. 31, no. 2, 2007, pp. 279-84.
Shaw KA, Srikanth VK, Fryer JL, et al. Dual energy X-ray absorptiometry body composition and aging in a population-based older cohort. Int J Obes (Lond). 2007;31(2):279-84.
Shaw, K. A., Srikanth, V. K., Fryer, J. L., Blizzard, L., Dwyer, T., & Venn, A. J. (2007). Dual energy X-ray absorptiometry body composition and aging in a population-based older cohort. International Journal of Obesity (2005), 31(2), 279-84.
Shaw KA, et al. Dual Energy X-ray Absorptiometry Body Composition and Aging in a Population-based Older Cohort. Int J Obes (Lond). 2007;31(2):279-84. PubMed PMID: 16788568.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Dual energy X-ray absorptiometry body composition and aging in a population-based older cohort. AU - Shaw,K A, AU - Srikanth,V K, AU - Fryer,J L, AU - Blizzard,L, AU - Dwyer,T, AU - Venn,A J, Y1 - 2006/06/20/ PY - 2006/6/22/pubmed PY - 2007/4/24/medline PY - 2006/6/22/entrez SP - 279 EP - 84 JF - International journal of obesity (2005) JO - Int J Obes (Lond) VL - 31 IS - 2 N2 - OBJECTIVE: The aims of this cross-sectional study were (1) to examine the effect of age on body composition in older adults using dual-energy X-ray absorptiometry (DXA) and (2) to evaluate the agreement of DXA with standard indirect anthropometric measures (body mass index (BMI), waist circumference and waist-to-hip ratio (WHR)). RESEARCH METHODS AND PROCEDURES: A population-based sample of 731 adults aged between 50 and 79 years underwent measurement of BMI, waist circumference, WHR, DXA total body fat mass, DXA % total body fat, DXA % trunk fat and DXA lean body mass. Linear regression was used to test for trend in measures of body composition between age categories in men and women. Partial correlations and Bland-Altman analysis were used to examine the agreement of DXA measures with indirect measures. RESULTS: DXA lean body mass decreased significantly with increasing age in both sexes (P<0.05). In males, BMI (P=0.01) and body weight (P<0.01) decreased with age, and in females, WHR (P=0.05), DXA % total fat (P=0.02) and DXA % trunk fat (P=0.05) increased with age. There was good agreement between DXA measures of fatness and indirect anthropometric measures, except for WHR, which showed greater variability in its comparisons with DXA. CONCLUSION: Using the highly sensitive and direct DXA method of measuring body composition, a decline in lean body mass and an increase in adiposity was observed with aging. Except for WHR, indirect anthropometric measures generally showed high levels of agreement with DXA fat measures in this older cohort. SN - 0307-0565 UR - https://www.unboundmedicine.com/medline/citation/16788568/Dual_energy_X_ray_absorptiometry_body_composition_and_aging_in_a_population_based_older_cohort_ L2 - https://doi.org/10.1038/sj.ijo.0803417 DB - PRIME DP - Unbound Medicine ER -