Table 2 Sensitivity and specificity of anti-citrullinated fibronectin antibodies.
| Patient group | n | anti-FN-Cit1035,1036 positive | sensitivity (%) | specificity (%) |
|---|---|---|---|---|
| established RA a | 82 | 41 | 50.0 | |
| early RA a | 278 | 124 | 44.6 | |
| Controls | 186 | 3 | 1.6 | 98.4 |
| non-RA | 154 | 3 | 1.9 | 98.1 |
| Healthy | 32 | 0 | 0 | 100 |