Table 4. Diagnostic performance of individual and combined CT findings of adnexal torsion.
| CT findings | Sensitivity | Specificity | Positive LR a | Negative LR a | AUC |
|---|---|---|---|---|---|
| Uterine deviation | |||||
| Reader 1 | 51.16 (35.5–66.7) | 86.05 (72.1–94.7) | 3.67 (1.7–8.1) | 0.57 (0.4–0.8) | 0.69 (0.58–0.78) |
| Reader 2 | 39.53 (25.0–55.6) | 83.72 (69.3–93.2) | 2.43 (1.1–5.3) | 0.72 (0.5–1.0) | 0.62 (0.51–0.72) |
| Thickened pedicle with ancillary findingsb | |||||
| Reader 1 | 74.42 (58.8–86.5) | 97.67 (87.7–99.9) | 32.00 (4.6–223.8) | 0.26 (0.2–0.4) | 0.86 (0.77–0.93) |
| Reader 2 | 72.09 (56.3–84.7) | 97.67 (87.7–99.9) | 31.00 (4.4–217.0) | 0.29 (0.2–0.5) | 0.85 (0.76–0.92) |
| Uterine deviation OR thickened pedicle with ancillary findingsb | |||||
| Reader 1 | 74.42 (58.8–86.5) | 83.72 (69.3–93.2) | 4.57 (2.3–9.2) | 0.31 (0.2–0.5) | 0.79 (0.69–0.87) |
| Reader 2 | 72.09 (56.3–84.7) | 81.40 (66.6–91.6) | 3.87 (2.0–7.4) | 0.34 (0.2–0.6) | 0.77 (0.66–0.85) |
| Uterine deviation AND thickened pedicle with ancillary findingsb | |||||
| Reader 1 | 51.16 (35.5–66.7) | 100.00 (91.8–100.0) | 0.49 (0.4–0.7) | 0.76 (0.65–0.84) | |
| Reader 2 | 39.53 (25.0–55.6) | 100.00 (91.8–100.0) | 0.60 (0.5–0.8) | 0.70 (0.59–0.79) |
Note: Numbers in parentheses are 95% confidence intervals
a LR means likelihood ratio. Positive LR for uterine deviation and thickened pedicle with ancillary findings cannot be determined because there is no false positive.
b Ancillary findings include a whirl sign, a navel sign or uterine deviation facing thickened pedicles.