Table 1 Characteristics of RA cases at diagnosis of RA
Characteristic | NHS (n = 388) | NHSII (n = 49) |
|---|---|---|
Age at diagnosis (mean ± SD) | 57 ± 9 | 43 ± 5 |
Rheumatoid factor positive (n [%]) | 223 (57%) | 27 (55%) |
Rheumatoid nodules (n [%]) | 51 (13%) | 6 (12%) |
Radiographic changes (n [%]) | 117 (30%) | 17 (35%) |
Diagnosed by a member of ACR (n [%]) | 320(84%) | 47 (96%) |
Mean number of ACR criteria for RA [44], (SD) | 5 ± 1 | 5 ± 1 |