APOB and diabetes mellitus: In the ACS group, the proportion of diabetes mellitus was higher, and the levels of plasma complement C1q of patients in the ACS were also lower, while the levels of total triglycerides (TG), low-density lipoprotein cholesterol (LDL-C), very low-density lipoprotein cholesterol (VLDL-C) and apolipoprotein B (Apo B) were higher.