Table 1.
Demographics and Baseline Disease Characteristics of the Study Population
| Demographics | Mean ± SD |
|---|---|
| N | 1493 |
| Mean age | 48.34 ± 11.7 years (range: 23–95 years) |
| Gender distribution n (%) | |
| Males | 259 (17.3%) |
| Females | 1234 (82.7%) |
| Mean disease duration | 8.9 ± 8.1 years (range: 1–37 years) |
| Rheumatoid factor (positive) | 1122 (75.2%) |
| ACPA (Positive) | 1054 (70.6%) |
| MTX (Yes) | 970 (65.0%) |
| Baseline disease characteristics | Mean ± SD |
| CDAI | 28.6 ± 9.8 (range 12.0–70.0) |
| DAS28-ESR | 6.48 ± 10.3 (range 3.3–9.05) |
Abbreviations: ACPA, anti-cyclic citrullinated peptide; CDAI, clinical disease activity index; DAS28-ESR, 28-joint disease activity score calculated using erythrocyte sedimentation rate; MTX, methotrexate; SD, standard deviation.