Table 4. Diagnostic performances of 2D ADC measurement for treatment response.
Parameters | Cutoff | Sensitivity | Specificity | AUC |
---|---|---|---|---|
Pretreatment 2D ADCminimum | ||||
Reader 1 | ≤956 | 78% | 50% | 0.639 |
Reader 2 | >765 | 78% | 50% | 0.556 |
Pretreatment 2D ADCmean | ||||
Reader 1 | >1011 | 89% | 50% | 0.667 |
Reader 2 | >1001 | 78% | 50% | 0.611 |
Posttreatment 2D ADCminimum | ||||
Reader 1 | ≤1442 | 85% | 100% | 0.885* |
Reader 2 | ≤1481 | 77% | 75% | 0.788* |
Posttreatment 2D ADCmean | ||||
Reader 1 | ≤2079 | 85% | 75% | 0.904* |
Reader 2 | ≤1783 | 69% | 75% | 0.788* |
Percent change 2D ADCminimum | ||||
Reader 1 | ≤37.73 | 78% | 100% | 0.889* |
Reader 2 | ≤39.3 | 100% | 100% | 1.000* |
Percent change 2D ADCmean | ||||
Reader 1 | ≤34.73 | 100% | 100% | 1.000* |
Reader 2 | ≤40.51 | 100% | 50% | 0.778 |
2D ADC, apparent diffusion coefficient values derived from single-section regions of interest.
AUC, areas under the curve.
* indicates statistical significance.