Correlation matrices of traditional lipid measures and lipid classes.

(a) Correlation matrix of cholesterol, LDL-C, HDL-C and triglyceride levels with LC-MS measured lipid classes; numbers show 2-digit rounded correlation values; dendrograms represent the hierarchical clustering of lipid classes according to their correlation measures. All correlations above r = 0.30 are considered significant at the p = 0.05 level. (b) Correlation matrix of lipid classes with each other ordered by hierarchical clustering to group together the correlated lipid classes. Heatmap scale represents correlation strength, with red and blue for positive and negative correlations respectively. All correlations above r = 0.30 or below -0.30 are considered significant at the p = 0.05 level.