Table 4.
Diagnostic value of MRI and 18F-FDG-PET/CT related to the timing of the imaging procedure
| ≤ 14days of start of symptoms | >14 days of start of symptoms | Total | |
|---|---|---|---|
| MRI | 29 | 39 | 68 |
| Sensitivity | 50 (28.3–71.8) | 82 (61.9–93.6) | 67 (52.5–80.0) |
| Specificity | 86 (42.2-97.6) | 83 (51.6–97.4) | 84 (60.4–96.4) |
| PPV | 92 (61.5-98.6) | 92 (73.0–98.7) | 92 (77.5–98.2) |
| NPV | 35 (14.3-61.7) | 67 (38.4–88.1) | 50 (31.9–68.1) |
| Accuracy | 58 (40.0-76.0) | 82 (69.9–94.1) | 72 (61.3–82.7) |
| 18F-FDG-PET/CT | 32 | 36 | 68 |
| Sensitivity | 96 (79.6–99.3) | 96 (78.8–99.3) | 96 (86.0–99.4) |
| Specificity | 100 (58.9–100) | 92 (61.5–98.6) | 95 (73.9–99.1) |
| PPV | 100 (85.6–100) | 96 (78.8–99.3) | 98 (88.9–99.7) |
| NPV | 88 (47.4–97.9) | 92 (61.5–98.6) | 90 (68.3–98.5) |
| Accuracy | 97 (91.1–100) | 94 (86.2–100) | 96 (91.3–100) |