Research Article
Immunodiagnostic Significance of Anti-RA33 Autoantibodies in Saudi Patients with Rheumatoid Arthritis
Table 2
Diagnostic immunology markers in RA and non-RA patients and healthy controls.
| Variables | Mean SD or frequency (%) of RA () | Mean SD or frequency (%) of non-RA () | Mean SD or frequency (%) of healthy controls () |
| C-reactive protein | | | | Negative | 8 19.5 | 18 58.1 | 22 75.9 | Positive | 33 80.5 | 13 41.9 | 7 24.1 | Rheumatoid factor | | | | Negative | 20 48.8 | 23 74.2 | 28 96.6 | Positive | 21 51.2 | 8 25.8 | 1 3.4 | Anti-CCP antibody | | | | Negative | 15 36.6 | 27 87.1 | 28 96.55 | Positive | 26 63.4 | 4 12.9 | 1 3.4 | Anti-RA33 antibody | | | | Negative | 38 92.7 | 30 96.7 | 28 96.6 | Positive | 3 7.3 | 1 3.2 | 1 3.4 |
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