Abstract | STUDY DESIGN: Assessment of correlation of measures of low back pain (LBP) using data pooled from 2 identical studies. OBJECTIVE: To assess the relative responsiveness of and correlation between various measures of LBP, including the Roland-Morris Disability Questionnaire (RMDQ), the LBP intensity (LBPI) visual analog scale (VAS), and patient's global assessment of response to therapy (PGART). SUMMARY OF BACKGROUND DATA: Several tools are available to measure pain, functional limitation, and response to therapy for LBP. Studies have shown varying degrees of responsiveness and correlation. METHODS: This was a pooled subgroup analysis of patients with chronic LBP from 2 identical studies comparing etoricoxib 60 mg, 90 mg, and placebo. LBP was assessed by the time-weighted average change from baseline over 12 weeks as measured by RMDQ, LBPI VAS, and PGART. Correlation was calculated using Pearson's correlation coefficient. RESULTS: The correlation (r) between LBPI and RMDQ changes ranged from 0.657 and 0.703; correlations between LBPI and PGART changes ranged from 0.677 and 0.738. Cutpoints separating responders from nonresponders for all 3 measures fell near the 66.7th percentile of response and were consistent with minimal clinically significant changes identified in the literature. CONCLUSION: In this study, the RMDQ, LBPI VAS, and PGART showed a high degree of correlation in measuring response to therapy in LBP, suggesting clinicians may be able to simplify assessments.
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Authors | Eric A Sheldon, Steven R Bird, Steven S Smugar, Andrew M Tershakovec |
Journal | Spine
(Spine (Phila Pa 1976))
Vol. 33
Issue 5
Pg. 533-8
(Mar 01 2008)
ISSN: 1528-1159 [Electronic] United States |
PMID | 18317199
(Publication Type: Journal Article, Randomized Controlled Trial)
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Chemical References |
- Cyclooxygenase Inhibitors
- Pyridines
- Sulfones
- Etoricoxib
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Topics |
- Adolescent
- Adult
- Aged
- Chronic Disease
- Cyclooxygenase Inhibitors
(administration & dosage)
- Disability Evaluation
- Etoricoxib
- Female
- Humans
- Low Back Pain
(diagnosis, drug therapy)
- Male
- Middle Aged
- Pain Measurement
- Pyridines
(administration & dosage)
- ROC Curve
- Sulfones
(administration & dosage)
- Surveys and Questionnaires
- Treatment Outcome
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