Tested on Gulf Medical Boards (DHA, SMLE, MOH & HAAD)
Clinical calculations and diagnostic scoring systems like WOMAC Osteoarthritis Index frequently appear on Prometric exams. Master high-yield clinical vignettes with instant AI-powered pathophysiology rationales.
What is the WOMAC Osteoarthritis Index?
The WOMAC Osteoarthritis Index is an evidence-based clinical decision rule engineered to quantify diagnostic probability, stratify clinical severity, and guide therapeutic decision-making in orthopedics & rheumatology practice. The Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) is a tri-dimensional health status instrument widely used in orthopedics and rheumatology to assess hip and knee osteoarthritis outcomes before and after pharmacotherapy or joint replacement surgery. Clinical scoring tools like WOMAC Osteoarthritis Index are essential in acute and outpatient management, enabling clinicians to objectively differentiate between low-risk candidates suitable for conservative therapy and high-risk patients requiring urgent interventions. Verified against current 2026 clinical standards, this tool is extensively tested on Gulf health authority licensing exams including DHA (Dubai), SMLE (Saudi Arabia), MOH, HAAD/DOH (Abu Dhabi), OMSB (Oman), and QCHP (Qatar).
💡Clinical Pearls & Diagnostic Utility
The international gold standard outcome metric for assessing clinical response to total joint replacement (TKR/THR) and osteoarthritis clinical trials.
Formula & Calculation Parameters
The mathematical equation and clinical variables required to calculate WOMAC Osteoarthritis Index:
Score Interpretation & Clinical Stratification
| Score Range | Clinical Interpretation | Risk Tier |
|---|---|---|
| ≤ 20 | Mild Osteoarthritis Impairment (0 - 20 pts) | green |
| 21 – 50 | Moderate Osteoarthritis Impairment (21 - 50 pts) | yellow |
| 51 – 75 | Severe Osteoarthritis Impairment (51 - 75 pts) | orange |
| ≥ 76 | Extreme Osteoarthritis Impairment (76 - 96 pts) | red |
When to Exercise Caution
Self-reported; patients with bilateral disease may have difficulty distinguishing disability between limbs.
Clinical Review Board
Dr. Muhammad Nouman, MBBS
Capital Medical University | PMDC Reg No: 117744-P
Clinical Audit Status
✓ Verified for 2026 Guidelines
Last updated: 2026-08-07
Peer-Reviewed Medical Literature
- •Bellamy N, et al. Validation study of WOMAC: a health status instrument for measuring clinically important patient relevant outcomes to antirheumatic drug therapy in patients with osteoarthritis of the hip or knee. J Rheumatol. 1988;15(12):1833-1840.
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