INS and Insulin resistance: Considering the results of the multivariate analysis, we could see that between BMI and the analyzed biochemical parameters, only the BMI percentile has a significant predictive power for metabolic markers of insulin resistance (insulin value: AUC = 0.72, p < 0.001 and HOMA index: AUC = 0.68, p = 0.003) (Table 5, Figure 5).