Baseline characteristics for analyses—mean (SD) unless otherwise noted
| Database | 1 | 2 | 3 |
|---|---|---|---|
| Number of patients | 51 | 147 | 744 |
| Age, years | 59 (11.2) | 58 (12) | 56 (13.5) |
| Female, No (%) | 29 (57) | 101 (69) | 539 (72) |
| Disease duration in years | 14 (7.5) | 11 (7) | 6.4 (9.5) |
| RF positive, No (%) | 42 (82) | 117 (81) | 496 (68) |
| Anti-CCP positive, No (%) | 37 (73) | 95 (69) | 146 (70) |
| DAS28 at inclusion | 2.5 (0.7) | 3.5 (1.3) | 5.2 (1.1) |
| 3.4 (1.2)* | |||
| No of previous DMARDs, median (p25–p75) | 3 (2–3) | 3 (2–3) | 0 (0–2) |
*Data at 3 months after inclusion in NOR-DMARD.
DAS28, Disease Activity Score 28; RA, rheumatoid arthritis. Anti-CCP, anti-cyclic citrullinated peptide.