Fig. 4

Receiver Operating Characteristic (ROC) curve analysis evaluating the predictive performance of VFA, SFA, and VFA/SFA ratio for MetS risk. The area under the curve (AUC) values are: VFA: 0.844, SFA: 0.573, VFA/SFA ratio: 0.730, with an overall model AUC of 0.840. VFA alone has the highest AUC, indicating superior predictive ability for MetS risk, while SFA has a weaker predictive performance. The VFA/SFA ratio shows intermediate predictive power