Patients’ characteristics
| N | ||
| Total | 26 | |
| Demographics | ||
| Gender | ||
| Female | 21 | 80.8% |
| Mean age (years) (range) | 50.8 | (31.3–68.2) |
| Female mean age (years) (range) | 50.8 | (31.3–68.2) |
| Male mean age (years) (range) | 50.7 | (35–57.9) |
| Biopsied knee | ||
| Right | 13 | 50.0% |
| Diagnosis | ||
| RA | 17 | 65.4% |
| Rheumatoid factor positive | 10 | 38.6% |
| Anti-CCP positive | 12 | 46.2% |
| DAS 28 (mean) (SD) | 3.85 | (1.03) |
| PsA | 3 | 11.5% |
| OA | 4 | 15.4% |
| Gout | 1 | 3.8% |
| UA | 1 | 3.8% |
| Elevated CRP (> 5 mg/L) | 14 | 53.8% |
| Erosive disease (RA) | 4 | 15.4% |
| Treatment (RA. PsA) | ||
| Methotrexate | 3 | 11.5% |
| TNF inhibitors | 4 | 15.4% |
| Other | 1 | 3.8% |
CCP, cyclic citrullinated peptides; CRP, C reactive protein; DAS, dsease activity score; OA, ostoearthritis; PsA, psoriatic arthritis; RA, rheumatoid arthritis; TNF, tumour necrosis factor.