Table 2 AUC of TyG-BMI, BMI, TyG, TyG/HDL-C, TG, and the Model in predicting MAFLD risk
Variable | AUC | 95%CI | Cut-off value | Sensitivity (%) | Specificity (%) | Youden's index |
|---|---|---|---|---|---|---|
Total sample | ||||||
 TyG-BMI | 0.884 | (0.877, 0.891) | 218.284 | 0.817 | 0.783 | 0.599 |
 BMI | 0.848 | (0.839, 0.856) | 24.615 | 0.763 | 0.760 | 0.523 |
 TyG | 0.795 | (0.785, 0.805) | 8.771 | 0.779 | 0.677 | 0.456 |
 TG/HDL-C | 0.782 | (0.772,0.792) | 1.146 | 0.762 | 0.676 | 0.438 |
 TG | 0.778 | (0.768, 0.788) | 1.475 | 0.797 | 0.635 | 0.432 |
 Model | 0.763 | (0.753, 0.773) | -0.478 | 0.736 | 0.661 | 0.397 |
Training sample | ||||||
 TyG-BMI | 0.885 | (0.877, 0.894) | 217.401 | 0.827 | 0.772 | 0.599 |
 BMI | 0.848 | (0.838, 0.858) | 24.335 | 0.798 | 0.725 | 0.524 |
 TyG | 0.798 | (0.786, 0.809) | 8.788 | 0.772 | 0.692 | 0.464 |
 TG/HDL-C | 0.783 | (0.771, 0.795) | 1.150 | 0.764 | 0.682 | 0.446 |
 TG | 0.780 | (0.768, 0.792) | 1.475 | 0.802 | 0.634 | 0.436 |
 Model | 0.766 | (0.754, 0.779) | -0.426 | 0.712 | 0.690 | 0.401 |
Validation sample | ||||||
 TyG-BMI | 0.881 | (0.868, 0.895) | 219.406 | 0.813 | 0.794 | 0.607 |
 BMI | 0.846 | (0.831, 0.861) | 24.555 | 0.768 | 0.756 | 0.524 |
 TyG | 0.788 | (0.770, 0.806) | 8.713 | 0.804 | 0.638 | 0.442 |
 TG/HDL-C | 0.780 | (0.762, 0.798) | 1.054 | 0.800 | 0.629 | 0.429 |
 TG | 0.774 | (0.755, 0.792) | 1.525 | 0.766 | 0.657 | 0.423 |
 Model | 0.757 | (0.737, 0.776) | -0.400 | 0.710 | 0.688 | 0.398 |