Classification System | Cut-off point | Sensitivity (IC 95%) | Specificity (IC 95%) | PPV (%) | NPV (%) | Cut-off point accuracy (IC 95%) |
---|---|---|---|---|---|---|
ACR 1997 | ≥ 4 criteria | 95.1 | 76.4 | 84.7 | 91.9 | 87.2 |
(89.6–98.2) | (66.2–84.8) |  |  | (81.9–91.4) | ||
EULAR/ACR | Total score ≥ 10 | 95.1 | 58.4 | 75.8 | 89.7 | 79.6 |
(89.6–98.2) | (47.5–68.8) |  |  | (73.6–84.8) | ||
Total score ≥ 13 | 91.0 | 83.2 | 88.1 | 87.1 | 87.7 | |
(84.4–95.4) | (73.7–90.3) |  |  | (82.5–91.8) | ||
SLICC | ≥ 4 criteria | 97.5 | 76.4 | 85.0 | 95.8 | 88.6 |
(93.0–99.5) | (66.2–84.8) |  |  | (83.6–92.6) |