Table 5. Diagnostic performances of the mean homogeneity indices obtained from the 12 ROIs for discriminating pleomorphic adenomas from Warthin tumor.
| ROI size (mm2) | Optimal cutoff values | AUC ± SE (95% CI) | Sensitivities (95% CI) | Specificities (95% CI) | PPV (%) | NPV (%) | ACC (%) |
|---|---|---|---|---|---|---|---|
| 9 | 0.07 | 0.731±0.061 (0.615–0.828) | 63.9 (46.2–79.2) | 83.8 (68.0–93.8) | 79.3 | 70.5 | 74.0 |
| 28 | 0.10 | 0.742±0.059 (0.627–0.838) | 63.9 (46.2–79.2) | 83.8 (68.0–93.8) | 79.3 | 70.5 | 74.0 |
| 34 | 0.11 | 0.746±0.059 (0.631–0.841) | 63.9 (46.2–79.2) | 83.8 (68.0–93.8) | 79.3 | 70.5 | 74.0 |
| 50 | 0.12 | 0.740±0.059 (0.624–0.836) | 61.1 (43.5–76.9) | 91.1 (68.0–93.8) | 87.0 | 70.6 | 76.3 |
| 60 | 0.12 | 0.735±0.059 (0.619–0.831) | 61.1 (43.5–76.9) | 81.1 (64.8–92.0) | 75.9 | 68.2 | 71.2 |
| 82 | 0.14 | 0.734±0.059 (0.618–0.831) | 61.1 (43.5–76.9) | 81.1 (64.8–92.0) | 75.9 | 68.2 | 71.2 |
| 93 | 0.14 | 0.730±0.059 (0.614–0.828) | 55.6 (38.1–72.1) | 83.8 (68.0–93.8) | 77.0 | 66.0 | 69.9 |
| 98 | 0.14 | 0.734±0.059 (0.618–0.831) | 61.1 (43.5–76.9) | 78.4 (61.8–90.2) | 73.3 | 67.4 | 69.9 |
| 115 | 0.17 | 0.738±0.058 (0.622–0.834) | 50.0 (32.9–67.1) | 89.2 (74.6–97.0) | 81.8 | 64.7 | 69.9 |
| 130 | 0.12 | 0.734±0.059 (0.618–0.831) | 80.1 (64.0–91.8) | 56.8 (39.5–72.9) | 64.3 | 74.6 | 68.3 |
| 136 | 0.12 | 0.742±0.058 (0.627–0.838) | 77.8 (60.8–89.9) | 62.2 (44.8–77.5) | 66.7 | 74.2 | 69.9 |
| 149 | 0.12 | 0.749±0.058 (0.634–0.843) | 86.1 (70.5–95.3) | 59.5 (42.1–75.2 | 67.4 | 81.5 | 72.6 |
ROC, receiver operating characteristic curve; AUC, area under curve; ADC, apparent diffusion coefficient; SE, standard error; CI, confidence interval; ROI, region of interest; PPV, positive predictive value; NPV, negative predictive value; ACC, accuracy.