Table 6.
AUC and optimal cut-off values of the statistically significant parameters (p < 0.05) in the differentiation of muscle invasive from non-muscle invasive urinary bladder cancer, listed MR sequence-wise
| Parameter | SSF | AUC | 95% CI | Cut-off | Sensitivity | Specificity |
|---|---|---|---|---|---|---|
| T2W | ||||||
| Mean | 2 | 0.701 | 0.536–0.835 | >−273.109 | 60.00 | 80.00 |
| Mean | 3 | 0.669 | 0.503–0.810 | >−617.830 | 66.67 | 80.00 |
| Skewness | 3 | 0.733 | 0.570–0.860 | <−0.709 | 66.67 | 80.00 |
| Skewness | 4 | 0.696 | 0.530–0.831 | <−0.259 | 73.33 | 68.00 |
| Kurtosis | 3 | 0.675 | 0.508–0.814 | >0.270 | 60.00 | 88.00 |
| DWI b1500 | ||||||
| SD | 0 | 0.789 | 0.631–0.902 | >25.729 | 93.33 | 56.00 |
| SD | 2 | 0.741 | 0.579–0.867 | >101.309 | 60.00 | 88.00 |
| SD | 3 | 0.739 | 0.576–0.864 | >149.639 | 60.00 | 88.00 |
| SD | 4 | 0.725 | 0.561–0.854 | >193.979 | 53.33 | 92.00 |
| SD | 5 | 0.736 | 0.573–0.862 | >137.990 | 80.00 | 68.00 |
| SD | 6 | 0.76 | 0.599–0.881 | >145.130 | 80.00 | 72.00 |
| ADC | ||||||
| Mean | 0 | 0.819 | 0.665–0.922 | <930.5 | 86.67 | 72.00 |
| MPP | 0 | 0.819 | 0.665–0.922 | <930.5 | 86.67 | 72.00 |
| Skewness | 2 | 0.729 | 0.566–0.857 | <−0.519 | 80 | 64.00 |
| Skewness | 3 | 0.757 | 0.596–0.879 | <−0.589 | 66.67 | 84.00 |
| Skewness | 4 | 0.773 | 0.614–0.890 | <−0.270 | 80 | 80.00 |
| Skewness | 5 | 0.744 | 0.582–0.869 | <−0.129 | 73.33 | 80.00 |
| Skewness | 6 | 0.751 | 0.589–0.874 | <0.079 | 73.33 | 84.00 |
| Kurtosis | 2 | 0.688 | 0.522–0.825 | >−0.289 | 80.00 | 60.00 |
AUC, area under curve; CI, confidence interval; MPP, mean of positive pixels; SD, standard deviation; SSF, spatial scale factor.
Parameters with AUC >0.8 are shown in bold text.