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Structural Validity of the Arabic Roland-Morris Disability Questionnaire Using Confirmatory Factor Analysis in
Abdulrahman M Alsubiheen1, Mishal M Aldaihan1, Ali H Alnahdi1
1Department of Rehabilitation Sciences, College of Applied Medical Sciences, King Saud University, P.O. Box 10219, Riyadh 11433, Saudi Arabia.
Journal of Clinical Medicine
|June 26, 2026
Summary
This study validates the Modern Standard Arabic Roland-Morris Disability Questionnaire (RMDQ) for low back pain (LBP) assessment. Findings support its structural validity and excellent internal consistency for Arabic-speaking patients.
Area of Science:
- Orthopedics and Sports Medicine
- Rehabilitation and Physical Therapy
- Health Outcomes Research
Background:
- Low back pain (LBP) is a significant global cause of disability.
- Patient-reported outcome measures (PROMs) like the Roland-Morris Disability Questionnaire (RMDQ) are crucial for evaluating LBP-related disability.
- The structural validity of the Modern Standard Arabic RMDQ requires thorough evaluation.
Purpose of the Study:
- To assess the structural validity of the Modern Standard Arabic version of the RMDQ.
- To evaluate the internal consistency and reliability of the Arabic RMDQ.
- To determine if the Arabic RMDQ exhibits a unidimensional structure.
Main Methods:
- A cross-sectional study involving 113 LBP patients from Saudi Arabian physical therapy clinics.
- Confirmatory factor analysis (CFA) was employed to test a unidimensional model of the Arabic RMDQ.
- Model fit was assessed using RMSEA, SRMR, TLI, and CFI; reliability was measured by McDonald's omega (ω).
Main Results:
- The initial one-factor CFA model demonstrated near-acceptable fit, which improved after accounting for residual correlations.
- The final model showed good fit indices (RMSEA = 0.038, SRMR = 0.145, TLI = 0.95, CFI = 0.95).
- McDonald's omega (ω) was 0.91, indicating excellent internal consistency; most items loaded significantly on the construct.
Conclusions:
- The Modern Standard Arabic RMDQ demonstrates supportive evidence for structural validity and excellent internal consistency.
- The instrument appears to possess a dominant unidimensional structure, suitable for LBP assessment.
- The Arabic RMDQ is potentially valuable for evaluating LBP disability in Arabic-speaking populations, pending further validation.