Table 4.
AUC and optimal cut-off values of the statistically significant parameters (p < 0.05) in the differentiation of high-grade from low-grade urinary bladder cancer, listed MR sequence-wise
| Parameter | SSF | AUC | 95% CI | Cut-off | Sensitivity | Specificity |
|---|---|---|---|---|---|---|
| T 2W | ||||||
| Skewness | 2 | 0.748 | 0.585–0.871 | <−0.930 | 68.97 | 81.82 |
| Skewness | 3 | 0.727 | 0.564–0.856 | <−0.479 | 75.86 | 72.73 |
| Kurtosis | 2 | 0.712 | 0.547–0.844 | >2.009 | 41.38 | 100 |
| Kurtosis | 3 | 0.693 | 0.527–0.829 | >0.270 | 41.38 | 100 |
| DWI b1500 | ||||||
| Kurtosis | 5 | 0.779 | 0.620–0.895 | >−0.379 | 58.62 | 100 |
| Kurtosis | 6 | 0.752 | 0.591–0.875 | >−0.560 | 65.52 | 81.82 |
| ADC | ||||||
| Mean | 0 | 0.897 | 0.759–0.970 | <963.479 | 79.31 | 100 |
| MPP | 0 | 0.897 | 0.759–0.970 | <963.479 | 79.31 | 100 |
| Skewness | 2 | 0.702 | 0.537–0.836 | <−0.519 | 65.52 | 81.82 |
| Skewness | 3 | 0.721 | 0.557–0.851 | <−0.460 | 65.52 | 90.91 |
| Kurtosis | 4 | 0.704 | 0.539–0.837 | >−0.280 | 48.28 | 90.91 |
| Kurtosis | 5 | 0.828 | 0.675–0.928 | >−0.579 | 79.31 | 81.82 |
| Kurtosis | 6 | 0.712 | 0.547–0.844 | >−0.730 | 72.41 | 72.73 |
AUC, area under curve; CI, confidence interval; MPP, mean of positive pixels; SSF, spatial scale factor.
Parameters with AUC >0.8 are shown in bold text.