What question did this study set out to answer?

To assess the feasibility, internal consistency, and convergent validity of the Rheumatoid Arthritis Disease Activity Index (RADAI) as a self-administered composite measure of disease activity.

March 1, 2000Lara D. VeekenOpen Access

Feasibility and validity of the RADAI, a self‐administered rheumatoid arthritis disease activity index

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To assess the feasibility, internal consistency, and convergent validity of the Rheumatoid Arthritis Disease Activity Index (RADAI) as a self-administered composite measure of disease activity.
Evaluated 484 patients with rheumatoid arthritis using the self-administered five-item RADAI questionnaire covering global disease activity, pain, morning stiffness, and joint counts.
Calculated Cronbach's alpha for internal consistency and evaluated convergent validity through correlation analyses against core set clinical measures and the 28-joint Disease Activity Score (DAS28).
Demonstrated high internal consistency for the five-item composite score with a Cronbach's alpha of 0.87.
Correlated significantly with physician global assessment (r = 0.59; P < 0.0001), Health Assessment Questionnaire scores (r = 0.55; P < 0.0001), and tender joint counts (r = 0.55; P < 0.0001), but weakly with erythrocyte sedimentation rate (r = 0.27; P < 0.0001).
Correlated moderately with DAS28 scores (r = 0.53; P < 0.0001), although overall agreement between the two metrics remained low.

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Implication

Validation study demonstrates reliable disease activity tracking with the self-administered RADAI in rheumatoid arthritis, suggesting it complements rather than replaces clinical indices.

Cite This Study

Fransen et al. (2000) studied this question.

synapsesocial.com/papers/6a971ba876292a5bc0fbc158 https://doi.org/10.1093/rheumatology/39.3.321

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Implication

Validation study demonstrates reliable disease activity tracking with the self-administered RADAI in rheumatoid arthritis, suggesting it complements rather than replaces clinical indices.

Feasibility and validity of the RADAI, a self‐administered rheumatoid arthritis disease activity index

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Discussion

Implication

Cite This Study

Feasibility and validity of the RADAI, a self‐administered rheumatoid arthritis disease activity index

Key Points

Discussion

Implication

Cite This Study

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