Table 1 Characteristics of rheumatoid arthritis patients included in the external validation study
Variable | Number (percentage) |
|---|---|
(Total number = 315) | |
Components of the algorithm for calculating CIRAS | |
Age in years, mean (SD) | 70 (10) |
Females | 255 (81.0) |
Inflammatory marker tests ordered | 230 (73.0) |
Rehabilitation visits (physical or occupational therapy visits) | 75 (23.8) |
Rheumatoid factor test ordered | 17 (5.4) |
Felty’s syndrome | 2 (0.6) |
Platelet counts ordered | |
None | 47 (14.9) |
1 | 24 (7.6) |
2 | 33 (10.5) |
3 | 35 (11.1) |
≥4 | 176 (55.9) |
Number of chemistry panels ordered | |
None | 76 (24.1) |
1 | 37 (11.7) |
2 | 52 (16.5) |
3 | 31 (9.8) |
4 | 25 (7.9) |
≥5 | 94 (29.8) |
Number of rheumatologist visits | |
None | 51 (16.2) |
1 to 4 | 220 (69.8) |
>4 | 44 (14.0) |
Rheumatoid arthritis severity variables | |
CIRAS, mean (SD) | 4.4 (1.2) |
DAS28-CRP, mean (SD) | 3.5 (1.5) |
MD-HAQ physical function score, mean (SD) | 2.5 (1.9) |