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Lo JC, Chandra M, Lee C, Darbinian JA, Ramaswamy M, Ettinger B. Bone Mineral Density in Older U.S. Filipino, Chinese, Japanese, and White Women. J Am Geriatr Soc 2020; 68:2656-2661. [PMID: 33047307 DOI: 10.1111/jgs.16785] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 07/15/2020] [Accepted: 07/17/2020] [Indexed: 11/30/2022]
Abstract
BACKGROUND/OBJECTIVES Bone mineral density (BMD) reference data exist for U.S. White, Black, and Hispanic (Mexican American) populations but not for U.S. Asians. Few studies have compared BMD findings among different U.S. Asian ethnicities. DESIGN Retrospective observational study. SETTING Large northern California healthcare system. PARTICIPANTS Asian and White women aged 50 to 79 years with BMD testing from 1998 to 2017 excluding those with estrogen or osteoporosis treatment, recent fracture, or select disorders affecting skeletal health. MEASUREMENTS Femoral neck (FN)-BMD and height data. METHODS Differences in FN-BMD were examined by ethnicity and age, comparing Filipino, Chinese, and Japanese women and non-Hispanic White women. Differences in BMD were also examined after adjustment for height. RESULTS There were 37,224 Asian women (including 11,147 Filipino, 10,648 Chinese, and 2,519 Japanese) and 115,318 non-Hispanic White women. Mean height was similar among the Asian subgroups and about 6 to 8 cm lower than Whites. Mean FN-BMDs differed by less than 3% for Filipino, Chinese, and Japanese and all were lower than Whites, with smaller Asian-White differences among younger women (<3%; ages 50-59) and larger differences among older women (6-8%; ages 65-79). Adjusting FN-BMD for height reduced White-Asian differences by about 30% to 40%. CONCLUSION Mean FN-BMD and height for Filipino, Chinese, and Japanese women were similar but consistently lower than White women, especially among older women. Although Asian-White BMD differences were substantially attenuated after height adjustment; some differences persisted for older women. Future studies should investigate potential age-cohort effects and the extent to which these BMD differences influence fracture risk and clinical care.
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Affiliation(s)
- Joan C Lo
- Division of Research, Kaiser Permanente Northern California, Oakland, California, USA.,The Permanente Medical Group, Oakland, California, USA
| | - Malini Chandra
- Division of Research, Kaiser Permanente Northern California, Oakland, California, USA
| | - Catherine Lee
- Division of Research, Kaiser Permanente Northern California, Oakland, California, USA.,The Permanente Medical Group, Oakland, California, USA
| | - Jeanne A Darbinian
- Division of Research, Kaiser Permanente Northern California, Oakland, California, USA
| | - Mohan Ramaswamy
- The Permanente Medical Group, Oakland, California, USA.,Department of Nuclear Medicine, Kaiser Permanente Walnut Creek Medical Center, Walnut Creek, California, USA
| | - Bruce Ettinger
- Division of Research, Kaiser Permanente Northern California, Oakland, California, USA
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Brennan-Olsen SL, Vogrin S, Leslie WD, Kinsella R, Toombs M, Duque G, Hosking SM, Holloway KL, Doolan BJ, Williams LJ, Page RS, Pasco JA, Quirk SE. Fractures in indigenous compared to non-indigenous populations: A systematic review of rates and aetiology. Bone Rep 2017; 6:145-158. [PMID: 28560269 PMCID: PMC5437735 DOI: 10.1016/j.bonr.2017.04.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Revised: 04/24/2017] [Accepted: 04/25/2017] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Compared to non-indigenous populations, indigenous populations experience disproportionately greater morbidity, and a reduced life expectancy; however, conflicting data exist regarding whether a higher risk of fracture is experienced by either population. We systematically evaluate evidence for whether differences in fracture rates at any skeletal site exist between indigenous and non-indigenous populations of any age, and to identify potential risk factors that might explain these differences. METHODS On 31 August 2016 we conducted a comprehensive computer-aided search of peer-reviewed literature without date limits. We searched PubMed, OVID, MEDLINE, CINAHL, EMBASE, and reference lists of relevant publications. The protocol for this systematic review is registered in PROSPERO, the International Prospective Register of systematic reviews (CRD42016043215). Using the World Health Organization reference population as standard, hip fracture incidence rates were re-standardized for comparability between countries. RESULTS Our search yielded 3227 articles; 283 potentially eligible articles were cross-referenced against predetermined criteria, leaving 27 articles for final inclusion. Differences in hip fracture rates appeared as continent-specific, with lower rates observed for indigenous persons in all countries except for Canada and Australia where the opposite was observed. Indigenous persons consistently had higher rates of trauma-related fractures; the highest were observed in Australia where craniofacial fracture rates were 22-times greater for indigenous compared to non-indigenous women. After adjustment for socio-demographic and clinical risk factors, approximately a three-fold greater risk of osteoporotic fracture and five-fold greater risk of craniofacial fractures was observed for indigenous compared to non-indigenous persons; diabetes, substance abuse, comorbidity, lower income, locality, and fracture history were independently associated with an increased risk of fracture. CONCLUSIONS The observed paucity of data and suggestion of continent-specific differences indicate an urgent need for further research regarding indigenous status and fracture epidemiology and aetiology. Our findings also have implications for communities, governments and healthcare professionals to enhance the prevention of trauma-related fractures in indigenous persons, and an increased focus on modifiable lifestyle behaviours to prevent osteoporotic fractures in all populations.
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Affiliation(s)
- Sharon L Brennan-Olsen
- Australian Institute for Musculoskeletal Science (AIMSS), University of Melbourne, Western Health, 176 Furlong Road, St Albans, 3021, VIC, Australia.,Department of Medicine, University of Melbourne-Western Precinct, 176 Furlong Road, St Albans, 3021, VIC, Australia.,Deakin University, Pigdon Road, Geelong, 3220, VIC, Australia.,Institute for Health and Ageing, Australian Catholic University, Level 6, 215 Spring Street, Melbourne, 3000, VIC, Australia
| | - Sara Vogrin
- Australian Institute for Musculoskeletal Science (AIMSS), University of Melbourne, Western Health, 176 Furlong Road, St Albans, 3021, VIC, Australia
| | - William D Leslie
- Department of Medicine (C5121), University of Manitoba, 409 Tache Avenue, Winnipeg R2H 2A6, Canada
| | - Rita Kinsella
- Australian Institute for Musculoskeletal Science (AIMSS), University of Melbourne, Western Health, 176 Furlong Road, St Albans, 3021, VIC, Australia.,Western Health, 176 Furlong Road, St Albans, 3021, VIC, Australia
| | - Maree Toombs
- Rural Clinical School, School of Medicine, University of Queensland, Toowoomba, 4350, QLD, Australia
| | - Gustavo Duque
- Australian Institute for Musculoskeletal Science (AIMSS), University of Melbourne, Western Health, 176 Furlong Road, St Albans, 3021, VIC, Australia.,Department of Medicine, University of Melbourne-Western Precinct, 176 Furlong Road, St Albans, 3021, VIC, Australia
| | - Sarah M Hosking
- Deakin University, Pigdon Road, Geelong, 3220, VIC, Australia
| | - Kara L Holloway
- Deakin University, Pigdon Road, Geelong, 3220, VIC, Australia
| | | | - Lana J Williams
- Deakin University, Pigdon Road, Geelong, 3220, VIC, Australia
| | - Richard S Page
- Deakin University, Pigdon Road, Geelong, 3220, VIC, Australia.,Barwon Centre for Orthopaedic Research and Education (B-CORE), Barwon Health, St John of God Hospital, Ryrie Street, PO Box 281, Geelong, 3220, VIC, Australia
| | - Julie A Pasco
- Department of Medicine, University of Melbourne-Western Precinct, 176 Furlong Road, St Albans, 3021, VIC, Australia.,Deakin University, Pigdon Road, Geelong, 3220, VIC, Australia.,Department of Preventive Medicine and Epidemiology, Monash University, Alfred Centre, Commercial Road, Prahran, VIC, Australia
| | - Shae E Quirk
- Monash Institute of Cognitive and Clinical Neurosciences, School of Psychological Sciences, Monash University, Wellington Road, Clayton, 3168, VIC, Australia
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Luo Y. A biomechanical sorting of clinical risk factors affecting osteoporotic hip fracture. Osteoporos Int 2016; 27:423-39. [PMID: 26361947 DOI: 10.1007/s00198-015-3316-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2015] [Accepted: 09/03/2015] [Indexed: 02/07/2023]
Abstract
Osteoporotic fracture has been found associated with many clinical risk factors, and the associations have been explored dominantly by evidence-based and case-control approaches. The major challenges emerging from the studies are the large number of the risk factors, the difficulty in quantification, the incomplete list, and the interdependence of the risk factors. A biomechanical sorting of the risk factors may shed lights on resolving the above issues. Based on the definition of load-strength ratio (LSR), we first identified the four biomechanical variables determining fracture risk, i.e., the risk of fall, impact force, bone quality, and bone geometry. Then, we explored the links between the FRAX clinical risk factors and the biomechanical variables by looking for evidences in the literature. To accurately assess fracture risk, none of the four biomechanical variables can be ignored and their values must be subject-specific. A clinical risk factor contributes to osteoporotic fracture by affecting one or more of the biomechanical variables. A biomechanical variable represents the integral effect from all the clinical risk factors linked to the variable. The clinical risk factors in FRAX mostly stand for bone quality. The other three biomechanical variables are not adequately represented by the clinical risk factors. From the biomechanical viewpoint, most clinical risk factors are interdependent to each other as they affect the same biomechanical variable(s). As biomechanical variables must be expressed in numbers before their use in calculating LSR, the numerical value of a biomechanical variable can be used as a gauge of the linked clinical risk factors to measure their integral effect on fracture risk, which may be more efficient than to study each individual risk factor.
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Affiliation(s)
- Y Luo
- Department of Mechanical Engineering, University of Manitoba, Winnipeg, MB, Canada.
- Department of Biomedical Engineering, University of Manitoba, Winnipeg, MB, Canada.
- Department of Anatomy, South Medical University, Guangzhou, China.
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Maple-Brown LJ, Hughes J, Piers LS, Ward LC, Meerkin J, Eisman JA, Center JR, Pocock NA, Jerums G, O'Dea K. Increased bone mineral density in Aboriginal and Torres Strait Islander Australians: impact of body composition differences. Bone 2012; 51:123-30. [PMID: 22561911 DOI: 10.1016/j.bone.2012.04.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/19/2012] [Revised: 04/15/2012] [Accepted: 04/18/2012] [Indexed: 10/28/2022]
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 (BMD(H)) 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 BMD(H) 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.
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Affiliation(s)
- L J Maple-Brown
- Menzies School of Health Research, Charles Darwin University, Northern Territory, Australia.
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Megyesi MS, Hunt LM, Brody H. A critical review of racial/ethnic variables in osteoporosis and bone density research. Osteoporos Int 2011; 22:1669-79. [PMID: 21207012 DOI: 10.1007/s00198-010-1503-z] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2010] [Accepted: 11/11/2010] [Indexed: 12/16/2022]
Abstract
UNLABELLED Racial and ethnic variables are common in research on variation in bone density. This literature review describes some of the common flaws associated with the use of these variables and provides some suggestions for how bone density research may be able to better document and address skeletal health disparities. INTRODUCTION Racial/ethnic differences in bone density have been commonly documented in the research literature. While effective identification of the specific factors underlying these trends might go a long way in informing treatment and screening for osteoporosis, this would require careful consideration of exactly what these variables are capturing. However, the basis and implications of what racial/ethnic variables represent have not carefully been examined in bone density research. METHODS For this paper, we systematically reviewed 55 articles that included bone density and race/ethnicity as key variables. Our analysis reveals that racial/ethnic terminology in these articles is highly variable, and discussion of how race/ethnicity is determined is often vague and idiosyncratic. Racial/ethnic variables are being used for a wide range of analytical purposes in statistical tests, which may not be appropriate for such a complex and poorly defined variable. RESULTS Many articles attribute racial/ethnic differences in bone mass/bone density to genetic causes, although few studies actually examine genetic data. CONCLUSION This analysis indicates that more rigorous examination of what race/ethnicity actually captures, more careful definitions of group labels and the procedures for assigning them, and attention to the limitations of how such variables can reliably be used in data analyses is needed to help address the problems and issues outlined in this review.
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Affiliation(s)
- M S Megyesi
- Joint POW/MIA Accounting Command, Central Identification Laboratory, 310 Worchester Ave Bldg 45, Hickam AFB, HI 96853-5530, USA.
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Colón-Emeric CS, Lyles KW, Su G, Pieper CF, Magaziner JS, Adachi JD, Bucci-Rechtweg CM, Haentjens P, Boonen S. Clinical risk factors for recurrent fracture after hip fracture: a prospective study. Calcif Tissue Int 2011; 88:425-31. [PMID: 21331567 DOI: 10.1007/s00223-011-9474-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2010] [Accepted: 01/25/2011] [Indexed: 11/28/2022]
Abstract
Additional fractures after hip fracture are common, but little is known about the risk factors associated with these events. We determined the clinical risk factors associated with fracture following a low-trauma hip fracture and whether clinical risk factors for subsequent fracture were modified by zoledronic acid (ZOL). In this post hoc analysis of the HORIZON Recurrent Fracture trial, 2,127 men and women were randomized within 90 days of surgical hip fracture repair to receive intravenous ZOL 5 mg yearly or placebo. All patients received a loading dose of vitamin D and daily oral calcium and vitamin D supplements. In the multivariable model age, sex, BMI, femoral neck T score, and one or more fall risk factors were significant predictors of subsequent fracture. Race, history of prior fracture other than the index hip fracture, T score < -2.5 as a dichotomous variable, and type of index hip fracture were not associated with a different risk of subsequent fractures. Treatment with ZOL did not modify the impact of these risk factors. Well-established risk factors for fracture risk such as age, sex, BMI, and fall risk factors will also contribute to fracture risk in patients who have already suffered a hip fracture, while other prior fractures and T score < -2.5 are not predictive of subsequent fractures. Baseline risk factors in hip fracture patients were predictive of fracture in both ZOL- and placebo-treated participants, and there is no difference in the risk of subsequent fractures based on index hip fracture type.
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Affiliation(s)
- Cathleen S Colón-Emeric
- Duke University Medical Center and the Geriatrics Research Education and Clinical Center, Veterans Affairs Medical Center, 508 Fulton St GRECC 182, Durham, NC 27705, USA.
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Abstract
The development of bone mineral densitimometry methodologies, especially central dual energy X-ray absorptiometry (DXA) methods have allowed this quantitative tool to be used to diagnose osteoporosis before the first fragility fracture has occurred. The World Health Organization osteoporosis working group set the stage for the BMD cut-off criteria development. The wide application of DXA has brought the treatment of osteoporosis to the primary care level, a very necessary step if this increasingly prevalent disease is to have a decline in its incidence. The most difficult osteoporosis cases, for which there are many and their associated difficult DXA results and interpretation will always require specialists' involvement. In particular, the embracement of the WHO absolute fracture risk validated project will take DXA to a much greater level of value in making management decisions. In particular, the WHO absolute risk data will allow physicians, health-economic policy makers, and payors of medical services to come closer together to decide which patients are at a level of unacceptable fracture risk that justifies treatment intervention. The implementation of this validated project will also remove the unacceptable subjective computer printouts on DXA reports that often lead to the over-treatment of low risk patients and at times the under-treatment of high risk patients. The evolution of the clinical interpretation of bone densitometry has been a work in progress. Challenges in the clinical measurement of bone strength remain and will also evolve. The field of osteoporosis has grown with the use of DXA and will continue to embrace this technology as other technologies to measure fracture risk become applied in clinical practice.
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Affiliation(s)
- Paul D Miller
- University of Colorado Health Sciences Center, Colorado Center for Bone Research, Lakewood, CO, USA.
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