GDF15 and type 2 diabetes mellitus: To further analyze the correlation between CAD and GDF-15 or ApoB/ApoA1 ratio in the T2DM patients, the data were divided into quartiles of GDF-15 or ApoB/ApoA1 ratio, taking the first quartiles as the reference to calculate the odds ratio (OR) for CAD, and the results were shown in Tabless 2 and 3.