Hip bone geometry in HIV/HCV-co-infected men and healthy controls
- V. Walker HarrisAffiliated withJohns Hopkins University School of Medicine Email author
- , C. G. SutcliffeAffiliated withJohns Hopkins School of Public Health
- , A. B. AraujoAffiliated withNew England Research Institutes
- , G. R. ChiuAffiliated withNew England Research Institutes
- , T. G. TravisonAffiliated withBoston University
- , S. MehtaAffiliated withJohns Hopkins School of Public Health
- , M. S. SulkowskiAffiliated withJohns Hopkins University School of Medicine
- , Y. HigginsAffiliated withJohns Hopkins University School of Medicine
- , D. L. ThomasAffiliated withJohns Hopkins University School of Medicine
- and 3 more
- , A. S. DobsAffiliated withJohns Hopkins University School of Medicine
- , T. J. BeckAffiliated withWhiting School of Engineering, Johns Hopkins University
- , T. T. BrownAffiliated withJohns Hopkins University School of Medicine
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People with both HIV and hepatitis C are more likely than those with HIV alone to have wrist, hip, and spine fractures. We compared hip strength between HIV/HCV-co-infected men and healthy men and found that HIV/HCV-co-infected men had decreased hip strength due to lower lean body mass.
Hepatitis C co-infection is a risk factor for fragility fracture among HIV-infected populations. Whether bone strength is compromised in HIV/HCV-co-infected patients is unknown.
We compared dual-energy x-ray absorptiometry (DXA)-derived hip geometry, a measure of bone strength, in 88 HIV/HCV-co-infected men from the Johns Hopkins HIV Clinic to 289 men of similar age and race and without HIV or HCV from the Boston Area Community Health Survey/Bone Survey. Hip geometry was assessed at the narrow neck, intertrochanter, and shaft using hip structural analysis. Lean body mass (LBM), total fat mass (FM), and fat mass ratio (FMR) were measured by whole-body DXA. Linear regression was used to identify body composition parameters that accounted for differences in bone strength between cohorts.
HIV/HCV-co-infected men had lower BMI, LBM, and FM and higher FMR compared to controls (all p < 0.05). At the narrow neck, significant differences were observed between HIV/HCV-co-infected men and controls in bone mineral density, cross-sectional area, section modulus, buckling ratio, and centroid position. After adjustment for race, age, smoking status, height, and weight, only buckling ratio and centroid position remained significantly different between cohorts (all p < 0.05). Substituting LBM, FM, and FMR for weight in the multivariate model revealed that differences in LBM, but not FM or FMR, accounted for differences in all narrow neck parameters between cohorts, except buckling ratio and centroid position.
HIV/HCV-co-infected men have compromised hip strength at the narrow neck compared to uninfected controls, which is attributable in large part to lower lean body mass.
KeywordsBody composition Bone strength Hepatitis C Hip structural analysis HIV
- Hip bone geometry in HIV/HCV-co-infected men and healthy controls
Volume 23, Issue 6 , pp 1779-1787
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- Body composition
- Bone strength
- Hepatitis C
- Hip structural analysis
- Industry Sectors
- Author Affiliations
- 1. Johns Hopkins University School of Medicine, Baltimore, MD, USA
- 2. Johns Hopkins School of Public Health, Baltimore, MD, USA
- 3. New England Research Institutes, Watertown, MA, USA
- 4. Boston University, Boston, MA, USA
- 5. Whiting School of Engineering, Johns Hopkins University, Baltimore, MD, USA