Cited by 371Bone health and osteoporosis researchNutrition and Health in AgingHip and Femur Fractures

Computed tomographic measurements of thigh muscle cross-sectional area and attenuation coefficient predict hip fracture: the health, aging, and body composition study

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Lang, Thomas, Cauley, Jane A, Tylavsky, Frances, Bauer, Douglas, Cummings, Steven, Harris, Tamara B·2010·Journal of Bone and Mineral Research

Abstract

Fatty infiltration of muscle, myosteatosis, increases with age and results in reduced muscle strength and function and increased fall risk. However, it is unknown if increased fatty infiltration of muscle predisposes to hip fracture. We measured the mean Hounsfield unit (HU) of the lean tissue within the midthigh muscle bundle (thigh muscle HU, an indicator of intramuscular fat), its cross-sectional area (CSA, a measure of muscle mass) by computed tomography (CT), bone mineral density (BMD) of the hip and total-body percent fat by dual X-ray absorptiometry (DXA), isokinetic leg extensor strength, and the Short Physical Performance Battery (SPPB) in 2941 white and black women and men aged 70 to 79 years. Sixty-three hip fractures were validated during 6.6 years of follow-up. Proportional hazards regression analysis was used to assess the relative risk (RR) of hip fracture across variations in thigh muscle attenuation, CSA, muscle strength, and physical function for hip fracture. In models adjusted by age, race, gender, body mass index, and percentage fat, decreased thigh muscle HU resulted in increased risk of hip fracture [RR/SD = 1.58; 95% confidence interval (CI) 1.10-1.99], an association that continued to be significant after further adjustment for BMD. In models additionally adjusted by CSA, muscle strength, and SPPB score, decreased thigh muscle HU but none of the other muscle parameters continued to be associated with an increased risk of hip fracture (RR/SD = 1.42; 95% CI 1.03-1.97). Decreased thigh muscle HU, a measure of fatty infiltration of muscle, is associated with increased risk of hip fracture and appears to account for the association between reduced muscle strength, physical performance, and muscle mass and risk of hip fracture. This characteristic captures a physical characteristic of muscle tissue that may have importance in hip fracture etiology.

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Authors
Lang, T., Cauley, J. A., Tylavsky, F., Bauer, D., Cummings, S., & Harris, T. B.
Affiliations
  • University of California, San Francisco (US)
  • University of Pittsburgh (US)
  • University of Tennessee Health Science Center (US)
  • California Pacific Medical Center (US)
  • National Institutes of Health (US)
Corresponding author
Lang, Thomas
Venue
Journal of Bone and Mineral Research
Published
2010-01-27
Volume
25
Issue
3
Pages
513-519
ISSN
  • 0884-0431 (ISSN-L)
  • 1523-4681
OpenAlex
W2057527999
Cited by
371
References
25
Citations by year
2026: 13 · 2025: 16 · 2024: 13 · 2023: 15 · 2022: 32 · 2021: 29 · 2020: 27 · 2019: 26 · 2018: 26 · 2017: 29 · 2016: 30 · 2015: 25 · 2014: 25 · 2013: 25 · 2012: 14
FWCI
13.64
Type
journal article
Language
en
Open access
Locations
  • Journal of Bone and Mineral Research (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • D-Scholarship@Pitt (University of Pittsburgh) (acceptedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
  • eScholarship (California Digital Library) (submittedVersion, cc-by)
Funders
  • National Institutes of Health
  • National Institute on Aging (N01‐AG‐6–2101, N01AG62106, N01-AG-62103)
Topics
  • Health Sciences › Medicine › Orthopedics and Sports Medicine › Bone health and osteoporosis research
  • Health Sciences › Medicine › Physiology › Nutrition and Health in Aging
  • Health Sciences › Medicine › Surgery › Hip and Femur Fractures
Keywords
hip fracture, thigh muscle cross-sectional area, intramuscular fat, myosteatosis, Hounsfield units, muscle attenuation, muscle mass, muscle strength, physical performance, bone mineral density, older adults, fall risk, aging
MeSH terms
Age Factors, Aged, Body Composition, Female, Health, Hip Fractures, Humans, Male, Predictive Value of Tests, Prognosis, Risk Factors, Tomography, X-Ray Computed, Absorptiometry, Photon, Bone Density, Body Mass Index, Muscle, Skeletal, Body Size

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