Demographic and clinical characteristics in five RA registries at baseline (main analysis: main cohort from 1 January 2000). N (%) unless otherwise indicated*
| CORRONA (n=24 176) | SRR (n=18 527) | NOAR (n=1564) | CORRONA International (n=3867) | IORRA (n=10 255) | ||
|---|---|---|---|---|---|---|
| Demographics | ||||||
| Sex | ||||||
| Male | 5791 (24.0%) | 5499 (29.7%) | 470 (30.1%) | 584 (15.1%) | 1829 (17.8%) | |
| Female | 18 385 (76.0%) | 13 028 (70.3%) | 1094 (69.9%) | 3283 (84.9%) | 8426 (82.2%) | |
| Missing | 0 | 0 | 0 | 0 | 0 | |
| Age, years | ||||||
| <50 | 5973 (24.7%) | 4268 (23.0%) | 390 (24.9%) | 1260 (32.6%) | 3016 (29.4%) | |
| 50 to <65 | 10 198 (42.2%) | 6934 (37.4%) | 588 (37.6%) | 1810 (46.8%) | 4529 (44.2%) | |
| ≥65 | 8005 (33.1%) | 7325 (39.5%) | 586 (37.5%) | 797 (20.6%) | 2710 (26.4%) | |
| Missing | 0 | 0 | 0 | 0 | 0 | |
See also online supplementary table S5.
CORRONA, Consortium of Rheumatology Researchers of North America; IORRA Institute of Rheumatology, NOAR, Norfolk Arthritis Register; SRR: Swedish Rheumatology Quality of Care Register.