Increased bone mineral density in Aboriginal and Torres Strait Islander Australians: Impact of body composition differences

Maple-Brown, L. J., Hughes, J., Piers, L. S., Ward, L. C., Meerkin, J., Eisman, J. A., Center, J. R., Pocock, N. A., Jerums, G. and O'Dea, K. (2012) Increased bone mineral density in Aboriginal and Torres Strait Islander Australians: Impact of body composition differences. Bone, 51 1: 123-130. doi:10.1016/j.bone.2012.04.011

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Author Maple-Brown, L. J.
Hughes, J.
Piers, L. S.
Ward, L. C.
Meerkin, J.
Eisman, J. A.
Center, J. R.
Pocock, N. A.
Jerums, G.
O'Dea, K.
Total Author Count Override 10
Title Increased bone mineral density in Aboriginal and Torres Strait Islander Australians: Impact of body composition differences
Journal name Bone   Check publisher's open access policy
ISSN 8756-3282
1873-2763
Publication date 2012-07
Sub-type Article (original research)
DOI 10.1016/j.bone.2012.04.011
Open Access Status File (Author Post-print)
Volume 51
Issue 1
Start page 123
End page 130
Total pages 8
Place of publication Philadelphia, PA, United States
Publisher Elsevier
Collection year 2013
Language eng
Formatted abstract
Bone mineral density (BMD) has been reported to be both higher and lower in Indigenous women from different populations. Body composition data have been reported for Indigenous Australians, but there are few published BMD data in this population. We assessed BMD in 161 Indigenous Australians, identified as Aboriginal (n = 70), Torres Strait Islander (n = 68) or both (n = 23). BMD measurements were made on Norland-XR46 (n = 107) and Hologic (n = 90) dual‐energy X-ray absorptiometry (DXA) machines. Norland BMD and body composition measurements in these individuals, and also in 36 Caucasian Australians, were converted to equivalent Hologic BMD (BMDH) and body composition measurements for comparison.

Femoral neck (FN) and lumbar spine Z-scores were high in Indigenous participants (mean FN Z‐score: Indigenous men + 0.98, p < 0.0001 vs. mean zero; Indigenous women + 0.82, p < 0.0001 vs. mean zero). FN BMDH was higher in Aboriginal and/or Torres Strait Islander than Caucasian participants, after adjusting for age, gender, diabetes and height and remained higher in men after addition of lean mass to the model. We conclude that FN BMD is higher in Aboriginal and/or Torres Strait Islander Australians than Caucasian Australian reference ranges and these differences still remained significant in men after adjustment for lean mass. It remains to be seen whether these BMD differences translate to differences in fracture rates.
Keyword Indigenous Australian
Aboriginal
Bone mineral density
Lean mass
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2013 Collection
School of Chemistry and Molecular Biosciences
 
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Created: Wed, 16 May 2012, 13:10:16 EST by Lucy O'Brien on behalf of School of Chemistry & Molecular Biosciences