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Related Experiment Videos

Spinal mobility in ankylosing spondylitis: reliability, validity and responsiveness.

K L Haywood1, A M Garratt, K Jordan

  • 1Unit of Health-Care Epidemiology, Department of Public Health, University of Oxford, Oxford OX3 7LF, UK. kirstie.haywood@uhce.ox.ac.uk

Rheumatology (Oxford, England)
|May 28, 2004
PubMed
Summary

Spinal mobility measures in ankylosing spondylitis (AS) show good reliability and validity. The modified Schober index (MSI), fingertip-to-floor distance (FFD), and cervical rotation (Crot) are recommended for clinical use.

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Area of Science:

  • Rheumatology
  • Orthopedics
  • Physical Therapy

Background:

  • Ankylosing spondylitis (AS) significantly impacts spinal mobility.
  • Accurate measurement of spinal mobility is crucial for patient management.
  • Existing measures require evaluation for their psychometric properties.

Purpose of the Study:

  • To assess the reliability, validity, and responsiveness of selected spinal mobility measures in AS patients.
  • To identify optimal measures for use in clinical practice and research.

Main Methods:

  • Trained observers measured spinal mobility in UK AS patients.
  • Inter-observer and intra-observer reliability were assessed.
  • Validity and responsiveness were evaluated against patient-reported outcomes and health transitions.

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Main Results:

  • All measures demonstrated high reliability (ICC > 0.90).
  • Modified Schober index (MSI) showed strong correlations with other mobility measures.
  • Fingertip-to-floor distance (FFD) and cervical rotation (Crot) were most responsive to perceived health changes.

Conclusions:

  • Selected spinal mobility measures possess adequate reliability and validity for AS.
  • MSI, FFD, and Crot are recommended for clinical practice and research due to their responsiveness.
  • These measures aid in tracking disease progression and treatment effectiveness.