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Ankylosing spondylitis: the correlation between a new metrology score and radiology
L G Kennedy1, T R Jenkinson, P A Mallorie
1Royal National Hospital for Rheumatic Diseases, Bath.
British Journal of Rheumatology
|August 1, 1995
Summary
The Bath Ankylosing Spondylitis Metrology Index (BASMI) shows strong correlation with radiology for assessing ankylosing spondylitis (AS) outcomes. BASMI may be a more reliable measure than current radiology standards.
Area of Science:
- Rheumatology
- Orthopedics
- Medical Imaging
Background:
- Ankylosing spondylitis (AS) is a chronic inflammatory disease primarily affecting the spine.
- Accurate assessment of disease progression and treatment effectiveness is crucial for managing AS.
- Current outcome measures, including radiology, have limitations in fully capturing disease impact.
Purpose of the Study:
- To compare the Bath Ankylosing Spondylitis Metrology Index (BASMI) with radiological assessments.
- To evaluate the utility of BASMI as a reliable outcome measure for ankylosing spondylitis.
Main Methods:
- Fifty-three AS patients with varying disease severity were assessed.
- Patients underwent blind and independent evaluation using BASMI (0-10 score) and spinal radiology.
- Correlation analysis was performed between BASMI components and corresponding radiological findings.
Main Results:
- BASMI demonstrated a positive correlation with the total radiology score (r=0.74).
- Individual BASMI measurements also showed positive correlations with respective radiological scores (r=0.50 to r=0.68).
- Discrepancies noted, as BASMI includes normal physical limitations and soft tissue involvement, unlike radiology.
Conclusions:
- BASMI is a valuable tool for assessing AS, correlating well with radiological findings.
- Radiological scores, despite being a 'gold standard', exhibit unreliability.
- BASMI may offer a more comprehensive and potentially superior method for evaluating AS outcomes.