| Name of the Instrument/Tool | Rheumatoid Arthritis Disease Activity Index (RADAI) |
| First Description |
Stucki G, Liang MH, Stucki S, Brühlmann P, Michel BA. A self-administered rheumatoid arthritis disease activity index (RADAI) for epidemiologic research. Psychometric properties and correlation with parameters of disease activity. Arthritis Rheum. 1995 Jun;38(6):795-8. doi: 10.1002/art.1780380612. PMID: 7779122. |
| Year | 1995 |
| Domains | |
| Concept of constructs | Disease activity |
| Population/Disease | Disease specific |
| Originally developed for | Rheumatoid Arthritis (RA) |
| Other rheumatic diseases where can be applied (only if validated) |
--- |
| Additional population with no rheumatic diseases |
No |
| Language: Originally published in | English |
| Available in Language | Dutch, French, German, Italian |
| REFERENCE IDENTIFICATION | |
| Author/s | Stucki G, Liang MH, Stucki S, Brühlmann P, Michel BA |
| Title | A self-administered rheumatoid arthritis disease activity index (RADAI) for epidemiologic research. Psychometric properties and correlation with parameters of disease activity. |
| Journal | Arthritis Rheum. |
| Year | 1995 |
| Vol | 38 |
| Num | 6 |
| Pages | 795-8 |
| Country | English |
| Language | USA |
| Other references of interest | |
| Link | https://pubmed.ncbi.nlm.nih.gov/21364057/ |
| Brief Description |
Clinical composite measures of disease activity for diagnosis and followup of undifferentiated peripheral inflammatory arthritis: a systematic review |
| Link | https://ard.bmj.com/content/60/Suppl_1/A334.3.responses |
| Brief Description |
Reliability and responsiveness of the RADAI, a self‐assessed rheumatoid arthritis disease activity index. |
| Link | https://onlinelibrary.wiley.com/doi/full/10.1002/acr.20621 |
| Brief Description |
Review of measures of rheumatoid arthritis disease activity. |
| Instrument/Tool Translations References | |
| No other References. | |
| DEVELOPER CONTACT INFORMATION | |
| Correspondence to | Gerold Stucki |
| gerold.stucki@phys.med.uin‐muenchen.de | |
| Address | Department of Physical Medicine and Rehabilitation, University Hospital Munich, Marchionistrasse 15, D‐81377 Munich, Germany. |
| Website | --- |
| Available | --- |
| Links | --- |
| DESCRIPTION OF THE INSTRUMENT | |
| Type Of Measure | Questionnaire |
| Brief Description |
The RADAI is a 5‐item questionnaire. The items ask about global disease activity in the last 6 months, current disease activity with respect to joint tenderness and swelling, arthritis pain, and duration of morning stiffness. The RADAI includes tender joints rated on a joint list. It has been evaluated for use in patients with undifferentiated peripheral inflammatory arthritis |
| Number of Items | 5 |
| Range | 0-10 |
| Responses options/scale |
No |
| Developed for | --- |
| PRACTICAL APPLICATION | |
| Method of administration | Self-administered |
| Recommendations to score |
Items 1–3 are scored on numerical rating scales from 0 = “not at all” to 10 = “extremely/very severe.” Item 4 on morning stiffness is scored on an ordered category scale from 0 = “none,” 1 = “<30 minutes,” 2 = “30 minutes to 1 hour,” 3 = “1–2 hours,” 4 = “2–4 hours,” 5 = “>4 hours,” and 6 = “all day” and transformed to a 0–10 range. Item 5, the joint list, is calculated as the sum of 16 joints or joint groups scored from 0 indicating “no pain” to 3 indicating “severe pain,” with the 0–48 score transformed to the 0–10 range. |
| Score Interpretation | 0 means no RA disease activity, with higher scores indicating higher levels of disease activity. |
| Cut-off points | RADAI score ≤2.0 has been identified as low or inactive disease (nonflare) |
| Cut-off points applied to | --- |
| Smallest detectable change if described | 1.4 |
| Smallest detectable change applied to | --- |
| Completion time by the patient | 5 minutes |
| Scoring time by the assessor | 1 minutes |
| Training to score | Not necessary |
| Strengths | Easy to use, Useful in clinical practice & research |
| Limitations | --- |
| OTHER COMMENTS | |
| Other Comments | --- |