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

Maple-Brown, Louise J., Hughes, Jaquelyne T., Piers, Leonard S., Ward, Leigh C., Meerkin, J., Eisman, J. A., Center, J. R., Pocock, N. A., Jerums, G. and O'Dea, Kerin (2012). Increased bone mineral density in Aboriginal and Torres Strait Islander Australians: impact of body composition differences. Bone,51(1):123-130.

Document type: Journal Article
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IRMA ID cmartelxPUB4
NHMRC Grant No. 545202
Title Increased bone mineral density in Aboriginal and Torres Strait Islander Australians: impact of body composition differences
Author Maple-Brown, Louise J.
Hughes, Jaquelyne T.
Piers, Leonard S.
Ward, Leigh C.
Meerkin, J.
Eisman, J. A.
Center, J. R.
Pocock, N. A.
Jerums, G.
O'Dea, Kerin
Journal Name Bone
Publication Date 2012
Volume Number 51
Issue Number 1
ISSN 8756-3282   (check CDU catalogue  open catalogue search in new window)
Scopus ID 2-s2.0-84860791611
Start Page 123
End Page 130
Total Pages 7
Place of Publication United States
Publisher Elsevier
HERDC Category C1 - Journal Article (DIISR)
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.
Keywords Indigenous Australian
Aboriginal
bone mineral density
lean mass
DOI http://dx.doi.org/10.1016/j.bone.2012.04.011   (check subscription with CDU E-Gateway service for CDU Staff and Students  check subscription with CDU E-Gateway in new window)


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