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Quantitative radiography in osteoarthritis: plain radiographs
1Department of Rheumatology, Hôpital Cochin, Paris, France.
Bailliere'S Clinical Rheumatology
|August 1, 1996
Summary
Measuring joint space width on X-rays is key for drug trials. Limiting variability in X-ray procedures, patient positioning, and measurement methods is crucial for detecting slow changes accurately.
Area of Science:
- Radiology
- Clinical Trials
- Osteoarthritis Research
Background:
- Joint space width (JSW) on plain radiographs is a primary outcome in disease-modifying osteoarthritis drug (DMOAD) clinical trials.
- Assessing JSW changes over time is challenging due to slow disease progression.
Purpose of the Study:
- To highlight the need for reducing measurement variability in radiological assessments.
- To emphasize the importance of standardized guidelines for improving the sensitivity of JSW measurements in clinical trials.
Main Methods:
- Review of current practices in radiological assessment of JSW.
- Identification of key sources of variability in radiographic procedures, joint positioning, and measurement techniques.
- Emphasis on the necessity of precise, standardized guidelines.
Main Results:
- Radiographic procedure, joint positioning, and measurement processes are significant sources of variability.
- Variability in these factors can obscure slow changes in JSW, impacting trial sensitivity.
- Standardized protocols are essential for reliable JSW assessment.
Conclusions:
- Precise guidelines for radiographic procedure, joint positioning, and reading methods are required.
- Standardization is critical to enhance the measurement capacity for detecting subtle changes in JSW.
- Implementing these guidelines will improve the reliability of JSW as an outcome measure in DMOAD trials.