Cited by 215Nutrition and Health in AgingHip disorders and treatmentsOsteoarthritis Treatment and Mechanisms

Reduced muscle radiological density, cross-sectional area, and strength of major hip and knee muscles in 22 patients with hip osteoarthritis

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Rasch, Anton, Byström, Anders H., Dalen, Nils, Berg, Hans E.·2007·Acta Orthopaedica

Abstract

BACKGROUND: Patients with hip osteoarthritis (OA) typically suffer joint pain, and often experience muscular weakness. We hypothesized that substantial atrophy would manifest in multiple muscle groups along the affected limb, resulting in severe muscle dysfunction. PATIENTS AND METHODS: We assessed 22 elderly patients with unilateral OA for maximal voluntary isometric strength of hip and knee muscles using a dynamometer that was developed for the purpose. Cross-sectional area (CSA) and radiological density (RD; in Hounsfield units: HU) of hip and knee muscles were assessed using CT. We determined SF-36, HHS, and EQ-5D. RESULTS: Hip extension, flexion, adduction, abduction, and knee extension strength were reduced (11- 29%; p < 0.01) in the OA limb relative to the healthy limb. Muscle CSA of hip extensors, flexors, adductors, knee extensors and flexors, but not hip abductors, was reduced (11-19%; p < 0.01) in the OA limb, where RD of all muscle groups except hip flexors was reduced (5-15 HU; p < 0.01). The clinical scores confirmed impairment. INTERPRETATION: Major muscles functioning around the hip and knee showed substantial loss of strength and mass, which contributes to the reduced ambulatory capacity of OA patients. Reduced muscle CSA could not fully explain the loss in strength. Infiltration with fat or other non-contractile components, as indicated by a reduced RD, in OA limb muscles was substantial.

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  • Radiological attenuation of the quadriceps muscle, a valid proxy of contractile density, showed no significant change in transgender women after 12 months of treatment, whereas transgender men demonstrated a +6% increase in contractile density with testosterone supplementation.

    “The more novel measure of radiological attenuation of the quadriceps muscle, a valid proxy of contractile density [74, 75], showed no significant change in transgender women after 12 months of treatment, whereas the parallel group of transgender men demonstrated a + 6% increase in contractile density with testosterone supplementation.”

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Authors
Rasch, A., Byström, A. H., Dalen, N., & Berg, H. E.
Affiliations
  • Danderyds sjukhus (SE)
  • Karolinska University Hospital (SE)
Corresponding author
Rasch, Anton
Venue
Acta Orthopaedica
Published
2007-01
Volume
78
Issue
4
Pages
505-510
ISSN
  • 1745-3674 (ISSN-L)
  • 1745-3682
OpenAlex
W2125543195
Cited by
215
References
12
Citations by year
2026: 4 · 2025: 12 · 2024: 12 · 2023: 12 · 2022: 12 · 2021: 20 · 2020: 16 · 2019: 13 · 2018: 15 · 2017: 6 · 2016: 10 · 2015: 12 · 2014: 17 · 2013: 9 · 2012: 9
FWCI
4.23
Type
journal article
Language
en
Open access
Locations
  • Acta Orthopaedica (publishedVersion)
  • Acta Orthopaedica (publishedVersion, cc-by-nc)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Physiology › Nutrition and Health in Aging
  • Health Sciences › Medicine › Surgery › Hip disorders and treatments
  • Health Sciences › Medicine › Rheumatology › Osteoarthritis Treatment and Mechanisms
Keywords
hip osteoarthritis, knee osteoarthritis, muscle atrophy, muscle strength, cross-sectional area, muscle density, hip extensors, hip flexors, hip abductors, knee extensors, knee flexors, ambulatory capacity, elderly patients, fatty infiltration
MeSH terms
Aged, Female, Hip Joint, Humans, Isometric Contraction, Knee Joint, Male, Middle Aged, Tomography, X-Ray Computed, Osteoarthritis, Hip, Muscle, Skeletal, Muscle Weakness

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