Hip bone geometry in HIV/HCV-co-infected men and healthy controls

V. Walker Harris, C. G. Sutcliffe, A. B. Araujo, G. R. Chiu, T. G. Travison, S. Mehta, M. S. Sulkowski, Y. Higgins, D. L. Thomas, A. S. Dobs, T. J. Beck, T. T. Brown

Research output: Contribution to journalArticle

Abstract

Summary 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. Introduction 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. Methods 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 HIVor 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. Results 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. Conclusion 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.

Original languageEnglish (US)
Pages (from-to)1779-1787
Number of pages9
JournalOsteoporosis International
Volume23
Issue number6
DOIs
StatePublished - Jun 1 2012

Keywords

  • Body composition
  • Bone strength
  • HIV
  • Hepatitis C
  • Hip structural analysis

ASJC Scopus subject areas

  • Endocrinology, Diabetes and Metabolism

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