Psychometric properties and cross-language equivalence of the revised Bristol Rheumatoid Arthritis Fatigue and the Rheumatoid Arthritis Impact of Disease scales in rheumatoid arthritis

Martijn A.H. Oude Voshaar,Christina Bode,Sarah Hewlett,John R. Kirwan,Laure Gossec,Mart A F J van de Laar

Psychometric properties and cross-language equivalence of the revised Bristol Rheumatoid Arthritis Fatigue and the Rheumatoid Arthritis Impact of Disease scales in rheumatoid arthritis

2019

Martijn A.H. Oude Voshaar
Christina Bode
Sarah Hewlett
John R. Kirwan
Laure Gossec
Mart A F J van de Laar

Objective To assess psychometric properties and cross-language measurement equivalence of six versions of the Bristol Rheumatoid Arthritis Fatigue Scale (BRAF-MDQ) and the Rheumatoid Arthritis Impact of Disease Score (RAID in rheumatoid arthritis (RA).

Keywords:

Medicine
Physical therapy
Equivalence (measure theory)
Rheumatoid arthritis
Disease
Polytomous Rasch model
Differential item functioning
Item response theory
group level
Patient-reported outcome

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