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Table 5 DIF testing WOMAC pain items for participants with Knee OA

From: Exploring differential item functioning in the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC)

 

Age

Gender

Social class

Townsend

Employed

Mood

BMI

No joints

SR DIF

5,3

3,5

none

3

3

1

2

3

  1. Key: Normal text: unpurified DIF items; Bold: final purified DIF items.
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BMC Musculoskeletal Disorders

ISSN: 1471-2474

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