PCSK9 and diabetes mellitus: Therefore, the aims of this study were to assess: (1) the relationship between baseline PCSK9 levels and incidence of MACEs in patients with ST-segment elevation myocardial infarction (STEMI) undergoing primary percutaneous coronary intervention (PCI) with or without DM; and (2) the relationships between PCSK9 levels and metabolism, inflammation and platelet activation markers.