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Ankle osteoarthritis scale

R T Domsic1, C L Saltzman

  • 1Department of Orthopaedic Surgery, University of Iowa Hospital, Iowa City 52242, USA.

Foot & Ankle International
|August 7, 1998
PubMed
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A new Ankle Osteoarthritis Scale was developed and validated to reliably measure pain and disability in patients with symptomatic ankle arthritis. This tool demonstrates excellent reliability and validity for clinical assessment.

Area of Science:

  • Orthopedics
  • Rheumatology
  • Medical Outcomes Research

Background:

  • Existing outcome tools for symptomatic ankle arthritis lack disease-specific reliability and validity.
  • A validated, disease-specific instrument is needed for accurate clinical assessment of ankle osteoarthritis.

Purpose of the Study:

  • To develop and validate a simple, reliable outcome measure for ankle osteoarthritis.
  • To assess patient symptoms and functional limitations specifically related to ankle joint osteoarthritis.

Main Methods:

  • Modified the Foot Function Index into the Ankle Osteoarthritis Scale (AOS).
  • Assessed test-retest reliability, criterion validity (vs. WOMAC, SF-36), and construct validity.
  • Collected normative data from 562 individuals.

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Main Results:

  • The AOS demonstrated excellent reliability (overall r=0.97).
  • High concordance was found with WOMAC and SF-36 for criterion validity.
  • The AOS was sensitive to the degree of ankle joint dysfunction.

Conclusions:

  • The Ankle Osteoarthritis Scale is a reliable and valid self-assessment tool.
  • The AOS effectively measures patient symptoms and disabilities in ankle arthritis.
  • Women reported higher pain and disability scores, with minor influence from BMI and arthritis presence.