Assays | Sensitivity (%) | Specificity (%) |
---|---|---|
CCP2, second generation anti-cyclic citrullinated peptide antibodies; Ig, immunoglobulin; RF, rheumatoid factor. | ||
IgG-RF | 43.7 | 91.0 |
IgA-RF | 50.9 | 88.3 |
IgM-RF | 66.4 | 82.1 |
CCP2 | 64.4 | 97.1 |
IgG-/IgA- or IgM-RF | 70.5 | 74.5 |
IgG-/IgA-/IgM-RF or CCP2 | 80.7 | 73.3 |
IgG-RF or CCP2 | 72.9 | 89.0 |
IgA-RF or CCP2 | 73.6 | 86.4 |
IgM-RF or CCP2 | 79.3 | 80.7 |