Table 3. Diagnostic performance of ADC histogram parameters in differentiating AM and ATM.
| Parameters | AUC (95% CI) | Cutt-off value | Sensitivity (%) | Specificity (%) | Accuracy (%) | PPV (%) | NPV (%) |
|---|---|---|---|---|---|---|---|
| Mean | 0.814 (0.698, 0.900) | 119.65 | 80.00 | 70.00 | 75.38 | 75.70 | 75.00 |
| ADC1 | 0.900 (0.801, 0.961) | 103.00 | 94.29 | 73.33 | 84.62 | 80.50 | 91.70 |
| ADC10 | 0.896 (0.795, 0.958) | 99.00 | 71.43 | 96.67 | 83.08 | 96.20 | 74.40 |
| ADC50 | 0.868 (0.761, 0.939) | 114.00 | 71.43 | 90.00 | 80.00 | 89.30 | 73.00 |
AM, angiomatous meningioma; ATM, atypical meningioma; ADC, apparent diffusion coefficient; AUC, area under the receiver operating characteristic curve; CI, confidence intervals; PPV, positive predictive value; NPV, negative predictive value.