Table 1 Characteristics of patients with rheumatoid arthritis (RA), non-RA controls, and healthy controls
| Â | Patients with RA | Non-RA controls | Healthy controls |
|---|---|---|---|
Number | 95 | 44 | 36 |
Female, percentage | 68 | 57 | 56 |
Age in years (SD) | 56 (11) | 54 (9.7) | 34 (15) |
Current smoker, percentage | 23 | 27 | 14 |
Former smoker, percentage | 40 | 43 | 0 |
Body mass index | 25.8 (4.9) | 25.4 (4.4) | NA |
Number of teeth | 23.4 (6.3) | 24.2 (4.9) | 27.8 (2.9) |
RA duration in years (SD) | 7.4 (5.9) | 0 | 0 |
DAS28 (SD) | 2.4 (0.93) | 0 | 0 |
Seropositive for IgM-RF, percentage | 53 | 0 | NA |
Seropositive for ACPAs, percentage | 71 | NA | NA |
Medication for RA, percentage | Â | Â | Â |
   None | 6 | 100 | 100 |
   DMARDs | 79 | 0 | 0 |
   Anti-TNFα | 15 | 0 | 0 |