| N | % | |
| Functional class | ||
| Class I | 16 | 16.0 |
| Class II | 40 | 40.0 |
| Class III | 34 | 34.0 |
| Class IV | 10 | 10.0 |
| Total | 100 | 100.0 |
| Disease activity (DAS28 score categories) |
|
|
| Low disease activity (≤ 3.2) | 15 | 15.0 |
| Moderate disease activity (3.2 - 5.1) | 39 | 39.0 |
| High disease activity (>5.1) | 46 | 46.0 |
| Total | 100 | 100.0 |
| Duration of the disease in year-categories (quartiles) | ||
| First quartile (lowest) ≤ 2 | 25 | 25.0 |
| Interquartile range (average) 2.1 - 12 | 50 | 50.0 |
| Fourth quartile (highest) > 12 | 25 | 25.0 |
| Total | 100 | 100.0 |
| Count of hospital admissions during the last year-categories | ||
| None | 65 | 65.0 |
| Once | 15 | 15.0 |
| 2+ | 20 | 20.0 |
| Total | 100 | 100.0 |