Fig. 3

Heatmap showing significant correlations (P < 0.05) between variables in the familial hypercholesterolemia (FH) group. The heatmap visualizes significant correlations between parameters such as age, carotid intima-media thickness (CIMT), lipid profile (Total-C, LDL-C, HDL-C, Triglycerides), oxidative stress markers (MDA, SOD, Catalase), and oxysterols (5,6-epoxycholesterol, 27-OHC, C-Triol, 7-KC). Positive correlations are shown in shades of red, and negative correlations in shades of blue. The correlation coefficient (r) and significance level (P) are indicated in each cell