Description

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

 


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