Comparison of the prediction accuracy of the optimal cut-off points
| Indices | Cut-off point | AUC (95% CI) | SN (%) | SP (%) | PPV (%) | NPV (%) | Youden’s J statistic |
|---|---|---|---|---|---|---|---|
| FLI | |||||||
| Traditional | < 30 | 0.735 (0.721–0.747) | 68.22 | - | 75.26 | 72.26 | 46.90 |
| > 60 | 0.623 (0.609–0.637) | - | 94.53 | 83.92 | 58.70 | 24.55 | |
| New | > 22.4 | 0.819 (0.807–0.830) | 79.42 | 69.88 | 71.48 | 78.13 | 49.30 |
| HSI | |||||||
| Traditional | < 30 | 0.668 (0.654–0.681) | 92.58 | - | 59.85 | 85.32 | 33.55 |
| > 36 | 0.667 (0.653–0.681) | - | 89.83 | 80.30 | 62.63 | 33.43 | |
| New | > 32.9 | 0.792 (0.779–0.804) | 73.17 | 70.74 | 70.39 | 73.50 | 43.91 |
| FSI | |||||||
| Traditional | > 23 | 0.701 (0.687–0.714) | 54.43 | 85.73 | 78.38 | 66.44 | 40.16 |
| New | > 13.6 | 0.822 (0.810–0.833) | 76.13 | 73.17 | 72.95 | 76.34 | 49.30 |
| ZJU index | |||||||
| Traditional | < 32 | 0.684 (0.670–0.697) | 95.87 | - | 60.67 | 91.24 | 36.79 |
| > 38 | 0.667 (0.653–0.680) | - | 91.88 | 82.91 | 62.28 | 33.32 | |
| New | > 34.9 | 0.826 (0.814–0.836) | 74.92 | 75.35 | 74.29 | 75.97 | 50.27 |
The hyphen (-) was used to conceal data that were not necessary in that comparison. AUC: area under the receiver operating characteristic curve; 95% CI: 95% confidence interval; SN: sensitivity; SP: specificity; PPV: positive predictive value; NPV: negative predictive value; FLI: fatty liver index; HSI: hepatic steatosis index; FSI: Framingham Steatosis index; ZJU index: Zhejiang University index