Distribution of anticitrullinated protein antibody levels among participants
| All (n=40 136; %) | No RA (n=39 298; %) | Self-reported RA (n=838; %) | Defined RA (n=138; %) | |
|---|---|---|---|---|
| ≥6.2 U/mL | 1.0 | 0.8 | 10.7 | 44.2 |
| <4.3 U/mL | 98.3 | 98.5 | 88.5 | 55.1 |
| 4.3–6.2 U/mL | 0.7 | 0.7 | 0.8 | 0.7 |
| 6.2–10 U/mL | 0.2 | 0.2 | 0.4 | 0.7 |
| ≥10 U/mL | 0.8 | 0.6 | 10.3 | 43.5 |
RA, rheumatoid arthritis.