Fig. 3

The distributions of blood lipids in each age group are illustrated by the Box and Whisker Plot, and the dotted lines represent the values ranging from minimum to maximum. T-test was used when both groups had normally distributed data; otherwise, Mann–Whitney U test was used. * P < 0.05, ** P < 0.01. CAD Coronary artery disease, n-CAD non Coronary artery disease, TG Triglyceride, TC Total cholesterol, HDL-C High density lipoprotein cholesterol, LDL-C low density lipoprotein cholesterol, AIP atherogenic index of plasma