The WOMAC (Western Ontario and McMaster Universities) index is used to assess patients with osteoarthritis of the hip or knee using 24 parameters. It can be used to monitor the course of the disease or to determine the effectiveness of anti-rheumatic medications.
Pain: 5 items
Stiffness: 2 items
Physical function: 17 items
While the index was being developed, performance of social functions and the status of emotional function were also included. These were not included in the final instrument.
Social function: 7 items
Emotional function: 10 items
Scoring and Interpretation
Response |
Points |
none |
0 |
slight |
1 |
moderate |
2 |
severe |
3 |
extreme |
4 |
Alternatively, a visual analogue scale (VAS) may be used, ranging from 0 to 10.
score =
= SUM(points for relevant items)
average score =
= (total score) / (number of items)
Interpretation:
• minimum total score: 0
• maximum total score: 96
• minimum pain subscore: 0
• maximum pain subscore: 20
• minimum stiffness subscore: 0
• maximum stiffness subscore: 8
• minimum physical function subscore: 0
• maximum physical function subscore: 68
Specialty: Surgery, orthopedic, Immunology/Rheumatology
ICD-10: ,