INS and chronic kidney disease: Pronounced differences in the medical history of CKD and PCI, admission characteristics (STEMI, heart rate, and Killip class), laboratory indices (CRP, peak TnT, creatinine, as well as leukocyte, neutrophil, lymphocyte, and platelet counts), usage of primary PCI and medications (aspirin, ACEI/ARB/ARNI, β-blocker, diuretics, and insulin), and LVEF level were observed across the SII tertiles.