Relative risk (RR) for rheumatoid arthritis (RA) diagnosis associated with anti-citrullinated protein antibody positivity
| Test | RR | (95% CI*) | (95% CI) |
|---|---|---|---|
| Anti-CCP2 test | 64.0 | (46.4 to 88.2) | (46.7 to 87.8) |
| High anti-CCP2 cut-off | 94.2 | (69.7 to 127.4) | (70.1 to 126.7) |
All estimates and CIs were adjusted for sex.
*CI adjusted to account for the twin clustering of data with a general estimation equation model.