Table 3.
Diagnostic performance evaluation of individual ADC parameters and the combination predictors for differentiating the low Ki-67 group from the high Ki-67 group
| Parameters | AUC | 95% CI | Cut-off value (× 10−3mm2/s) | Sensitivity (%) | Specificity (%) | Youden index | MCC |
|---|---|---|---|---|---|---|---|
| ADCmin | 0.770 | 0.693–0.848 | 0.86 | 74.47 | 68.91 | 0.434 | 0.306 |
| ADCmean | 0.714 | 0.631–0.797 | 1.11 | 65.96 | 68.07 | 0.340 | 0.211 |
| rADCmin | 0.778 | 0.702–0.855 | 1.14 | 76.60 | 69.75 | 0.463 | 0.329 |
| rADCmean | 0.726 | 0.644–0.808 | 1.55 | 63.83 | 74.79 | 0.386 | 0.278 |
| PRE | 0.800 | 0.721–0.879 | / | 74.07 | 80.58 | 0.492 | 0.448 |
MCC: Matthews correlation coefficient; PRE: predictive factor