Table 1.
Demographic and clinical characteristics of RA patients and healthy controls.
| Patients | Healthy controls | |
|---|---|---|
| Total number | 246 | 168 |
| Female, n (%) | 180 (73) | 104 (56) |
| Age, range of years | 21−71 | 40−77 |
| Nicotine users within 25 years, n (%) | 106 (57) | 96 (57) |
| Disease duration, range of years | 1−49 | NA |
| Autoantibodies, n (%) | ||
| Anti-cyclic citrullinated peptide positive | 145 (60) | NA |
| RF positive | 175 (82) | NA |
| Treatments, n (%) | NA | |
| Prednisolone | 29 (12) | |
| Methotrexate | 220 (89) | |
| Anti-CD20 antibodies | 12 (5) | |
| Anti-IL-6R antibodies | 7 (3) | |
| CTLR4-fusion protein | 2 (1) | |
| TNFα-inhibitors | 73 (31) | |