Relationship between indices of adiposity obtained by peripheral quantitative computed tomography and dual-energy X-ray absorptiometry in pre-pubertal children

Ducher, G., Daly, R. M., Hill, B., Eser, P., Naughton, G. A., Gravenmaker, K. J., Seibel, M. J., Javaid, A., Telford, R. D. and Bass, S. L. 2009, Relationship between indices of adiposity obtained by peripheral quantitative computed tomography and dual-energy X-ray absorptiometry in pre-pubertal children, Annals of human biology, vol. 36, no. 6, pp. 705-716.

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Title Relationship between indices of adiposity obtained by peripheral quantitative computed tomography and dual-energy X-ray absorptiometry in pre-pubertal children
Author(s) Ducher, G.
Daly, R. M.
Hill, B.
Eser, P.
Naughton, G. A.
Gravenmaker, K. J.
Seibel, M. J.
Javaid, A.
Telford, R. D.
Bass, S. L.
Journal name Annals of human biology
Volume number 36
Issue number 6
Start page 705
End page 716
Publisher Informa Healthcare
Place of publication Abingdon, England
Publication date 2009-12
ISSN 0301-4460
1464-5033
Keyword(s) body fat
body composition
obesity
pre-puberty
muscle density
Summary Background/Aim: The study investigated the relationship between indices of adiposity measured by peripheral quantitative computed tomography (pQCT) and dual-energy X-ray absorptiometry (DXA) in pre-pubertal children.

Subjects and methods: DXA-derived per cent body fat (%BF) was measured in 284 boys and 288 girls, aged 7–10 years. Cross-sections of the forearm (n=427) and lower leg (n=560) were obtained by pQCT to measure total cross-sectional area of the limb (Total CSA), Muscle CSA, Fat CSA, %Fat CSA (Fat CSA/Total CSA×100) and muscle density.

Results: Peripheral QCT-derived %Fat CSA in the forearm and lower leg correlated strongly with DXA-derived %BF (r=0.83–0.89, p<0.01) in both boys and girls. However, forearm and lower leg %Fat CSA were higher than whole body %BF by 5% and 10%, respectively. A better prediction of whole-body %BF was achieved by including %Fat CSA, muscle density and height into a hierarchical regression model. Using sex-specific regression equations, 87.7% of the boys and 83.7% of the girls had a predicted %BF within 3% units of the %BF obtained by DXA.

Conclusion:
In pre-pubertal children, pQCT measures of adiposity are strongly associated with whole-body per cent body fat. This reproducible method could be an alternative technique to estimate body composition in this population.
Language eng
Field of Research 110602 Exercise Physiology
Socio Economic Objective 920501 Child Health
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2009, Informa UK
Persistent URL http://hdl.handle.net/10536/DRO/DU:30030978

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