Table 1.
Composite indices measuring disease activity in rheumatoid arthritis.
| Instrument | Components | Thresholds of disease |
|---|---|---|
| Activity levels | ||
| Clinical disease activity index (CDAI) (range from 0 to 76.0) | Tender joint count | Remission: ≤2.8 |
| Swollen joint count | Low activity: from >2.8 to 10.0 | |
| Physician global assessment | Moderate: from >10 to 22.0 | |
| Patient global assessment | High: >22.0 | |
|
| ||
| Disease activity score in 28 joints (DAS28) (range from 0 to 9.4) | Tender joint count | Remission: <2.6 |
| Swollen joint count | Low activity: from ≥2.6 to <3.2 | |
| Patient global assessment | Moderate: from ≥3.2 to ≤5.1 | |
| ESR | High: >5.1 | |
|
| ||
| Simplified disease activity index (SDAI) (range 0 to 86.0) | Tender joint count | Remission: ≤3.3 |
| Swollen joint count | Low activity: from >3.3 to ≤11.0 | |
| Patient global assessment | Moderate: from >11.0 to ≤26.0 | |
| CRP | High: >26.0 | |