Patient self-report RADAI (Rheumatoid Arthritis Disease Activity Index) joint counts on an MDHAQ (Multidimensional Health Assessment Questionnaire) in usual care of consecutive patients with rheumatic diseases other than rheumatoid arthritis

Authors

  • Isabel Castrejón,

    1. New York University School of Medicine and NYU Hospital for Joint Diseases, New York
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  • Yusuf Yazici,

    1. New York University School of Medicine and NYU Hospital for Joint Diseases, New York
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    • Dr. Yazici has received consultant fees (less than $10,000 each) from Abbott, Bristol-Myers Squibb, Genentech, Johnson & Johnson, and Pfizer.

  • Theodore Pincus

    Corresponding author
    1. New York University School of Medicine and NYU Hospital for Joint Diseases, New York
    • Division of Rheumatology, NYU Hospital for Joint Diseases, 301 East 17th Street, Room 1608, New York, NY 10003
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    • Dr. Pincus has received consultant fees (less than $10,000 each) from Bristol-Myers Squibb, Genentech, and UCB.


Abstract

Objective

To analyze a patient self-report joint count from the Rheumatoid Arthritis Disease Activity Index (RADAI) on a Multidimensional Health Assessment Questionnaire (MDHAQ) in a cohort of consecutive patients seen in usual rheumatology care with rheumatoid arthritis (RA), systemic lupus erythematosus (SLE), osteoarthritis (OA), psoriatic arthritis (PsA), and gout.

Methods

Each patient completed an MDHAQ, which included a RADAI, at each visit in one usual care setting. In order to include a physician measure, a random visit at which there was a recorded physician global estimate was selected for each of 465 patients (174 patients with RA, 75 with SLE, 113 with OA, 53 with PsA, and 50 patients with gout). The RADAI was analyzed for total scores (range 0–48), number of involved joint groups (range 0–16), and each specific joint group, and then compared in the 5 diagnostic groups to one another and to other MDHAQ measures and the Routine Assessment of Patient Index Data 3 (RAPID3).

Results

In patients with RA, SLE, OA, PsA, and gout, mean RADAI scores (range 0–48) were 12.4, 6.5, 10.1, 6.7, and 2.7, respectively. The mean numbers of involved joint groups (range 0–16) were 6.9, 3.8, 4.8, 4.5, and 1.7, respectively, and the median numbers were 6, 2, 4, 4, and 1, respectively. RADAI scores were correlated significantly with the physician global estimate, except in SLE, and at higher levels with the MDHAQ and RAPID3 scores in all diagnostic groups.

Conclusion

The RADAI self-report joint counts can be used to record self-report involvement of specific joints and joint groups in patients with SLE, OA, PsA, and gout, with minimal effort on the part of the rheumatologist.

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