Comparison of the baseline IgM RF titres and concentrations of anti-CCP antibodies between patients with and without a marked decrease in acute phase reactants (CRP and ESR)
| Patients with a marked decrease in acute phase reactants* (n = 19) | Patients without a marked decrease in acute phase reactants (n = 15) | p Value | |
|---|---|---|---|
| *At least 20% decrease in CRP and ESR. Median values (range) are given. Mann-Whitney U test. | |||
| IgM RF (assay using particles sensitised with rabbit IgG) | 320 (0–1280) | 320 (80–5120) | 0.036 |
| IgM RF (assay using particles sensitised with human IgG) | 160 (0–640) | 320 (40–5120) | 0.023 |
| Anti-CCP antibodies (U) | 101 (12–2233) | 1017 (5–5003) | 0.179 |