Patients with rheumatoid arthritis
| Age | 61 (13) (range 25-81) |
| Sex | 19 female, 1 male |
| Disease duration | 20 (10) years (range 3-42) |
| Rheumatoid fator > 30 IU/ml | 18 |
| Current treatment | 19 |
| DMARDS | 12 |
| Corticosteroids | 7 |
| Aspirate volume | 21 (16) ml (range 3.0-68.0 ml) |
| Synovial fluid WCC (n=18) | 10.7 (8.4) × 106/ml (range 0.2-32.5 × 106/ml) |
| Neutrophils | 59.2 (24.3)% |
| Monocytes | 8.0 (4.4)% |
| Lymphocytes | 32.8 (24.4)% |
| Haemoglobin (n=17) | 120.2 (12.1) g/l (range 103.0-136.0 g/l) |
| Leucocytes (n=17) | 7.9 (2.0) × 106/ml (range 3.7-11.0 × 106/ml) |
| Platelets (n=18) | 389.6 (142.1) × 103/ml (range 186.0-702.0 × 103/ml) |
| Albumin (n=18) | 37.6 (4.56) g/l (range 30.0-45.0 g/l) |
| ESR (n=17) | 49.8 (35.5) mm/h (range 1.0-118.0 mm/h) |
Data shown as mean (SD) unless otherwise stated. DMARDS = disease modifying antirheumatic drugs; WCC = white cell count; ESR = erythrocyte sedimentation rate.