Table 1. Demographics and baseline characteristics of rheumatoid arthritis patients.
| Patient (n = 300) | Control (n = 300) | |
|---|---|---|
| Age, years (mean±SD) | 54.5 ± 15.48 | 53.84 ± 10.48 |
| Gender (male / female) | 134 / 166 | 146 / 154 |
| Smoking (yes / no) | 120 / 180 | 121 / 179 |
| Alcohol (yes / no) | 87 / 213 | 86 / 214 |
| Disease duration, years (mean±SD) | 9.10 ± 9.35 | |
| Disease onset (age; mean±SD) | 45.46 ± 12.58 | |
| Family history (yes / no) | 76 / 224 | |
| DAS28 (median ± SD) | 4.35 ± 1.61 | |
| DAS28 grade (n, %) | ||
| High activity | 25 (8.3%) | |
| Moderate | 110 (36.7%) | |
| Low | 132 (44.0%) | |
| Remission | 33 (11.0%) | |
| N of tender joints (mean±SD) | 8.68 ± 5.84 | |
| N of swollen joints (mean±SD) | 10.26 ± 5.53 | |
| Deformity (n) | 113 / 187 | |
| Morning stiffness (n, %) | ||
| None | 60 (20.0%) | |
| ≤1.0 h | 169 (56.3%) | |
| >1.0 h | 71 (23.7%) | |
| Positive / Negative Rheumatoid factor (n) | 241 / 59 | |
| Positive / Negative CRP (n) | 185 / 115 | |
| ESR (median ± SD) | 33.84 ± 21.85 | |
| Positive / Negative Anti-CCP (n) | 165 / 135 | |
DAS28: disease activity score in 28 joints; CRP: C-reactive protein; ESR: erythrocyte sedimentation rate; CCP: cyclic citrullinated peptide.