Cited by 435Musculoskeletal pain and rehabilitationOsteoarthritis Treatment and MechanismsLower Extremity Biomechanics and Pathologies

Factors associated with functional impairment in symptomatic knee osteoarthritis

Creamer, P., Lethbridge‐Cejku, M., Hochberg, M. C.·2000·Rheumatology

Abstract

OBJECTIVES: Knee osteoarthritis (OA) is a major cause of disability, particularly in the elderly. The factors determining disability remain unclear. The aim of this study was to assess the impact of clinical and psychosocial variables on function in knee OA and to develop models to account for observed variance in self-reported disability. METHODS: The subjects (n = 69) were hospital out-patients. Self-reported disability was measured by the Western Ontario and McMaster Universities (WOMAC) OA index. Pain was measured by the WOMAC and the McGill pain questionnaire. Depression, anxiety, helplessness, self-efficacy, fatigue and quality of life were measured by standard instruments. A detailed knee examination, including pain threshold by dolorimetry, was performed. Radiographs were scored for individual features. RESULTS: Pain severity, obesity and helplessness were the most important determinants of disability: a model including these variables accounted for 59.9% variance in WOMAC disability. Anxiety remained associated with disability in some models. Disability was unrelated to radiographic change. CONCLUSIONS: Function in symptomatic knee OA is determined more by pain and obesity than by structural change, at least as seen on plain X-ray. Our study provides further support for interventions targeting anxiety and helplessness in knee OA.

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  1. Badley EM, Thompson RP, Wood PHN. The prevalence 18. Jordan JM, Luta G, Renner J, Linder GF, Dragomir A, and severity of major disabling conditions. Int J Epidemiol Hochberg M et al. Self reported functional status in 1978;7:145-51. osteoarthritis of the knee in a rural Southern community:
  2. Krupp LB, LaRocca N, Muir-Nash J, Steinberg A. The 9. Davis MA, Ettinger W, Neuhaus J, Mallon KP. Knee fatigue severity scale: application to patients with multiple osteoarthritis and physical functioning: evidence from the sclerosis and SLE. Arch Neurol 1989;46:1121-3.
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Authors
Creamer, P., Lethbridge‐Cejku, M., & Hochberg, M. C.
Affiliations
University of Maryland, Baltimore (US)
Venue
Rheumatology
Published
2000-05
Volume
39
Issue
5
Pages
490-496
ISSN
  • 1462-0324 (ISSN-L)
  • 1462-0332
OpenAlex
W2145028795
Cited by
435
References
51
Citations by year
2026: 3 · 2025: 14 · 2024: 11 · 2023: 19 · 2022: 16 · 2021: 21 · 2020: 27 · 2019: 19 · 2018: 24 · 2017: 21 · 2016: 18 · 2015: 20 · 2014: 23 · 2013: 25 · 2012: 20
FWCI
5.18
Type
journal article
Language
en
Open access
closed
Locations
  • Lara D. Veeken (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Pharmacology › Musculoskeletal pain and rehabilitation
  • Health Sciences › Medicine › Rheumatology › Osteoarthritis Treatment and Mechanisms
  • Physical Sciences › Engineering › Biomedical Engineering › Lower Extremity Biomechanics and Pathologies
Keywords
knee osteoarthritis, functional disability, self-reported disability, pain intensity, obesity, helplessness, anxiety, psychosocial factors, WOMAC index, pain threshold, quality of life, self-efficacy, fatigue
MeSH terms
Aged, Anxiety, Disability Evaluation, Health Surveys, Helplessness, Learned, Humans, Obesity, Pain, Pain Measurement, Osteoarthritis, Knee

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