LPA and coronary artery disorder: This study had certain limitations: (1) The research objective of the study was to investigate ACS patients and whether the study results are applicable to stable CHD and other patient populations need to be confirmed by other studies; (2) the study was a retrospective design with some bias; (3) in the study, both Lp(a) and fibrinogen levels were measured at admission and were not monitored during follow-up.