Demographic features of patients with rheumatoid arthritis (RA) and controls. Data are presented as mean ± SD, median (interquartile range), or percentage as appropriate.
| Characteristic | RA, n = 302 | Controls, n = 1636 | p |
|---|---|---|---|
| Age, yrs | 53.5 ± 12.3 | 53.4 ± 8.2 | 0.999 |
| Female, n (%) | 237 (78.5) | 1282 (78.4) | 0.999 |
| Current smoker, n (%) | 33 (11.9) | 201 (12.3) | 0.776 |
| Hypertension, n (%) | 61 (20.2) | 340 (20.8) | 0.823 |
| Diabetes, n (%) | 27 (8.9) | 179 (10.9) | 0.300 |
| Dyslipidemia, n (%) | 58 (19.2) | 131 (8.0) | < 0.001 |
| Body mass index, kg/m2 | 22.8 ± 3.3 | 23.9 ± 3.2 | < 0.001 |
| Disease duration, yrs | 6 (3–12) | NS | NS |
| DAS28 | 4.2 (2.9–5.4) | NS | NS |
| Rheumatoid factor+, n (%) | 209 (69.2) | NS | NS |
| ACPA+, n (%) | 226 (74.8) | NS | NS |
DAS28: Disease Activity Score in 28 joints; ACPA: anticitrullinated protein antibody; NS: nonsignificant.