Concordance of responses to the ACR, EULAR, and SDAI improvement criteria. Values are n (%) unless otherwise specified.
| Measure A | Measure B | No Response on Measure A or B | Response on Measure A Only | Response on Measure B Only | Responses on Both Measures A and B | Agreement, % | κ |
|---|---|---|---|---|---|---|---|
| First-level responses | |||||||
| ACR20 | EULAR | 94 (38.7) | 14 (5.8) | 39 (16) | 96 (39.5) | 78.2 | 0.57 |
| ACR20 | SDAI50 | 125 (51.4) | 35 (14.4) | 8 (3.3) | 75 (30.9) | 82.3 | 0.64 |
| EULAR | SDAI50 | 108 (44.4) | 52 (21.4) | 0 | 83 (34.2) | 78.6 | 0.59 |
| Second-level responses | |||||||
| ACR50 | EULAR Good | 183 (75.3) | 32 (13.2) | 5 (2.1) | 23 (9.5) | 84.8 | 0.47 |
| ACR50 | SDAI70 | 179 (74.9) | 17 (7.1) | 6 (2.5) | 39 (15.5) | 90.4 | 0.70 |
| EULAR Good | SDAI70 | 194 (80.3) | 4 (1.7) | 20 (8.4) | 23 (9.6) | 90.0 | 0.60 |
ACR: American College of Rheumatology; EULAR: European League Against Rheumatism; SDAI: Simplified Disease Activity Index.