Demographic and disease characteristics of the included (N=1035) patients
| Age (years), Mean ± SD: | 67,1±14,5 |
| Gender (%) Female | 656 (63.4%) |
| DAS28 at time of diagnosis, Mean ± SD: | 4.5±0.9 |
| DAS28 after 4 months of treatment, Mean ± SD: | 3.1±0.8 |
| ΔDAS28, Mean ± SD: | 1.4±1.0 |
| IgM Rheumatoid Factor (%) Positive | 607 (58.6%) |
| Anti-ccp (%) Positive | 532 (51.4%) |