Age, gender, and race/ethnic differences in total body and subregional bone density
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Total body bone density of adults from National Health and Nutrition Examination Survey (NHANES) 1999–2004 differed as expected for some groups (men>women and blacks>whites) but not others (whites>Mexican Americans). Cross-sectional age patterns in bone mineral density (BMD) of older adults differed at skeletal sites that varied by degree of weight-bearing.
Total body dual-energy X-ray absorptiometry (DXA) data offer the opportunity to compare bone density of demographic groups across the entire skeleton.
The present study uses total body DXA data (Hologic QDR 4500A, Hologic, Bedford MA, USA) from the NHANES 1999–2004 to examine BMD of the total body and selected skeletal subregions in a wide age range of adult men and women from three race/ethnic groups. Total body, lumbar spine, pelvis, right leg, and left arm BMD and lean mass from 13,091 adults aged 20 years and older were used. The subregions were chosen to represent sites with different degrees of weight-bearing.
Mean BMD varied in expected ways for some demographic characteristics (men>women and non-Hispanic blacks>non-Hispanic whites) but not others (non-Hispanic whites>Mexican Americans). Differences in age patterns in BMD also emerged for some characteristics (sex) but not others (race/ethnicity). Differences in cross-sectional age patterns in BMD and lean mass by degree of weight-bearing in older adults were observed for the pelvis, leg, and arm.
This information may be useful for generating hypotheses about age, race, and sex differences in fracture risk in the population.
- Age, gender, and race/ethnic differences in total body and subregional bone density
Volume 20, Issue 7 , pp 1141-1149
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- Cross-sectional age patterns
- Gender differences
- Race/ethnic differences
- Total body bone mineral density
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- Author Affiliations
- 1. National Center for Health Statistics, Centers for Disease Control and Prevention, Room 4310, 3311 Toledo Road, Hyattsville, MD, 20782, USA
- 2. Division of Epidemiology, College of Medicine, Mayo Clinic, Rochester, MN, USA
- 3. Epidemiology, Demography and Biometry Program, National Institute on Aging, Bethesda, MD, USA
- 4. Department of Radiology, University of California San Francisco, San Francisco, CA, USA
- 5. Division of Musculoskeletal Diseases, National Institute of Musculoskeletal and Skin Diseases, Bethesda, MD, USA