Table 1.
Sample characteristics
| Characteristics | Total sample | RA sample | OA sample | Gout sample |
|---|---|---|---|---|
| N | 846 | 619 | 125 | 102 |
| Gender (%) | ||||
| Female | 64 | 69 | 79 | 18 |
| Male | 36 | 31 | 21 | 82 |
| Age (years) | ||||
| Mean (SD) | 62 (13.6) | 62 (14.2) | 63 (11.5) | 62 (12.6) |
| Disease duration (years) | ||||
| Mean (SD) | 13 (12.8) | 13 (12.4) | 14 (13.8) | 10 (13.3) |
| HAQ-DI (range 0–3) | ||||
| Mean (SD) | 0.82 (0.7) | 0.97 (0.7) | 1.00 (0.65) | 0.54 (0.67) |
| SF-36 PCS (range 0–100) | ||||
| Mean (SD) | 40 (8.4) | 39 (8.1) | 38 (8.3) | 43 (9.2) |
| SF-36 MCS (range 0–100) | ||||
| Mean (SD) | 39 (7.0) | 40 (6.8) | 39 (7.3) | 38 (7.0) |
RA Rheumatoid arthritis, OA Osteoarthritis, HAQ-DI Health Assessment Questionnaire Disability Index, SF-36 Medical Outcomes Study 36-Item Short Form (version 2), PCS Physical component summary, MCS Mental component summary