| Patients | Age (years)Mean (SD) | F/M (n) | Site of operation (n) | Treatment (n) | ESR(mm/1st h)Mean (SD) | CRP(mg/l)Mean (SD) |
| With RA (n = 12) | 62 (10) | 11/1 | Hip (6) Knee (4) Elbow (2) | Methotrexate (3) Prednisolone (3) Anti-TNF (2) Sulfasalazine (1) Hydroxychloroquine (1) Azathioprine (1) | 39 (20) | 27 (23) |
| With OA (n = 8) | 67 (7) | 6/2 | Hip (7) Knee (1) | 14 (11)* |
*p<0.05 compared with patients with rheumatoid arthritis.
CRP, C-reactive protein; ESR, erythrocyte sedimentation rate; OA, osteoarthritis; RA, rheumatoid arthritis; TNF, tumour necrosis factor.