Table 2 The sensitivity, specificity, positive and negative likelihood ratios for diagnosis of JSpA (clinical gold standard) predicted by MRI global assessment, by the ASAS definition of a positive MRI and for ‘adapted’ ASAS definitions, including BME lesions only seen on one slice or location, synovitis, capsulitis, retro-articular enthesitis, structural lesions and combinations of these features
From: ASAS definition for sacroiliitis on MRI in SpA: applicable to children?
N | Sensitivity | Specificity | LR | LR | |
|---|---|---|---|---|---|
% (95% CI) | % (95% CI) | + | - | ||
Global assessment | 30 | 49 (34.1–63.9) | 89 (78.1–95.3) | 4.45 | 0.57 |
ASAS definition | 14 | 26 (13.9–40.4) | 97 (88.8–99.6) | 8.67 | 0.76 |
ASAS OR focal lesions | 20 | 36 (22.7–51.5) | 95 (86.5–99.0) | 7.20 | 0.67 |
ASAS OR synovitis | 20 | 32 (19.1–47.1) | 92 (82.2–97.3) | 4 | 0.74 |
ASAS OR capsulitis | 17 | 32 (19.1–47.1) | 97 (88.8–99.6) | 10.67 | 0.70 |
ASAS OR retroarticular enthesitis | 18 | 30 (17.3–44.9) | 94 (84.3–98.2) | 5 | 0.74 |
ASAS OR structural | 16 | 28 (15.6–42.6) | 95 (86.5–99.0) | 5.60 | 0.76 |
ASAS OR focal lesions OR synovitis | 26 | 43 (28.3–57.8) | 90 (80.1–96.4) | 4.30 | 0.63 |
ASAS OR focal lesions OR capsulitis | 23 | 43 (28.3–57.8) | 95 (86.5–99.0) | 8.60 | 0.60 |
ASAS OR focal lesions OR synovitis OR capsulitis | 28 | 47 (32.1–61.9) | 90 (80.1–96.4) | 4.7 | 0.59 |