Table 5.
Diagnostic performance of the renal PDFF, RBF values, and perirenal fat thickness for the discrimination among the four groups
| Parameters | Cut-off | AUC | p | Sensitivity /% | Specificity /% |
|---|---|---|---|---|---|
| RBF value of the renal cortex | |||||
| Discriminating HC from T2DM | 160.7 | 0.684 | 0.011 | 55.81 | 84.62 |
| Discriminating T2DM from DKD | 140.5 | 0.802 | < 0.001 | 76.32 | 74.42 |
| Discriminating DKD I–II from DKD III–IV | 136.8 | 0.860 | < 0.001 | 92.86 | 62.50 |
| RBF value of the renal medulla | |||||
| Discriminating HC from T2DM | 39.18 | 0.958 | < 0.001 | 97.67 | 84.62 |
| Discriminating T2DM from DKD | 33.64 | 0.971 | < 0.001 | 92.11 | 95.35 |
| Discriminating DKD I-II from DKD III–IV | 29.97 | 0.762 | 0.008 | 100 | 62.5 |
| PDFF value of the renal cortex | |||||
| Discriminating HC from T2DM | 1.03 | 0.985 | < 0.001 | 100 | 92.31 |
| Discriminating T2DM from DKD | 1.41 | 0.969 | < 0.001 | 94.74 | 100 |
| Discriminating DKD I-II from DKD III–IV | 1.64 | 0.961 | < 0.001 | 100 | 79.27 |
| PDFF value of the renal medulla | |||||
| Discriminating HC from T2DM | 1.05 | 0.988 | < 0.001 | 97.68 | 92.33 |
| Discriminating T2DM from DKD | 1.38 | 0.955 | < 0.001 | 88.64 | 100 |
| Discriminating DKD I-II from DKD III–IV | 1.69 | 0.876 | < 0.001 | 78.57 | 83.33 |
| Perirenal fat thickness | - | ||||
| Discriminating HC from T2DM | 6.18 | 0.732 | 0.001 | 83.72 | 61.54 |
| Discriminating T2DM from DKD | 11.33 | 0.801 | < 0.001 | 78.95 | 74.42 |
| Discriminating DKD I-II from DKD III–IV | 19.43 | 0.842 | < 0.001 | 78.57 | 83.33 |
HC healthy control, T2DM type 2 diabetes mellitus, DKD diabetic kidney disease, AUC areas under curves, RBF renal blood flow, PDFF proton-density fat fraction