. Clinical and laboratory characteristics in patients with rheumatoid arthritis without fibromyalgia (RA) and with fibromyalgia (RAF).
| Characteristics | RA (n = 95) | RAF (n = 25) | p |
|---|---|---|---|
| Sex ratio (male:female) | 25:70 | 4:21 | 0.431 |
| Age (yrs) | 55.9 ± 13.6 | 61.4 ± 10.7 | 0.063 |
| RA duration (yrs) | 10.9 ± 9.1 | 12.8 ± 12.5 | 0.771 |
| Tender point count | 3.5 ± 3.4 | 14.2 ± 2.7 | < 0.0001 |
| Tender joint count | 2.87 ± 3.6 | 14.10 ± 7.6 | < 0.0001 |
| Swollen joint count | 2.98 ± 4.3 | 4.92 ± 3.9 | 0.022 |
| ESR (mm/h) | 39.4 ± 23.5 | 28.5 ± 29.2 | 0.410 |
| C-reactive protein (mg/l) | 18.3 ± 30.8 | 17.5 ± 24.7 | 0.941 |
| Patient’s global health VAS | 32.6 ± 21.6 | 60.4 ± 15.9 | < 0.0001 |
| Doctor’s global health VAS | 27.0 ± 16.8 | 45.5 ± 10.7 | < 0.0001 |
| DAS-28 | 3.67 ± 1.4 | 5.35 ± 1.1 | < 0.0001 |
| SDAI | 13.5 ± 10.8 | 31.8 ± 10.9 | < 0.0001 |
| CDAI | 11.8 ± 9.4 | 29.6 ± 10.7 | < 0.0001 |
| Health Assessment Questionnaire | 0.87 ± 0.76 | 1.83 ± 0.64 | < 0.0001 |
| Joint erosion findings (%) | 75.4 | 64.0 | 0.260 |
ESR: erythrocyte sedimentation rate; DAS-28: 28-joint Disease Activity Score; SDAI: Simplified Disease Activity Index; CDAI: Clinical Disease Activity Index; VAS: visual analog scale.