Figure 3.
Correlation heatmap of study variables. Spearman correlation coefficients between 14 Boruta-selected variables. Darker red indicates stronger positive correlations (e.g., BMI-METS-VF: R > 0.6), while darker blue indicates negative correlations. White squares denote weak or no correlation. BMI = body mass index, METS-VF = metabolic score for visceral fat.