Table 1.
Demographic characteristics of controls and patients with rheumatoid arthritis, systemic lupus erythematosus, or primary Sjögren’s syndrome.
| Variable | Patients with RA (n = 33) | Patients with SLE (n = 20) | Patients with pSS (n = 20) | Controls (n = 20) |
|---|---|---|---|---|
| Age, mean ± SD (years) | 62.5 ± 12.2 | 38.0 ± 14.0 | 55.2 ± 11.2 | 56.7 ± 13.7 |
| Sex (F:M) | 27:6 | 19:1 | 19:1 | 15:5 |
| Anti-CCP positivity, n (%) | 29 (87.9) | 1 (5.0) | 2 (10.0) | 0 (0) |
| RF positivity, n (%) | 25 (75.8) | 5 (25.0) | 11 (55.0) | 0 (0) |
RA, rheumatoid arthritis; SLE, systemic lupus erythematosus; pSS, primary Sjögren syndrome; SD, standard deviation; anti-CCP, antibodies to cyclic citrullinated peptides; RF, rheumatoid factor.