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Prognostic significance of reticulated platelet levels in diabetic patients with stable coronary artery disease

Abstract Levels of reticulated platelets (RP) increase during high platelet turnover conditions, and have been shown to correlate with diabetes mellitus (DM) status. Little is known regarding the prognostic significance of levels of RP among patients with stable coronary artery disease (SCAD). The study consisted of patients with SCAD and DM, who visited our cardiology outpatient clinic between June 2016 and February 2017. RP levels were measured at baseline as immature platelet fraction (IPF)%, using flow cytometry. Outcomes at 2 years consisted of bleeding events and major adverse cardiovascular events (MACE), which included death, myocardial infarction, cerebrovascular accident and urgent revascularization. The study included 104 patients (mean age - 71.2 ± 9.5 years, 76.9% were male, and 83.7% had hypertension). IPF was significantly higher at baseline among patients who had suffered from a MACE (4.57% vs. 2.53%, p < .001), and lower in patients who had suffered from bleeding events, compared with those who had not (1.57% vs. 3.00%, p = .004). There were higher rates of MACE at higher IPF quartiles (p < .001, AUC-0.770), and higher rates of bleeding at the lowest quartiles (p = .007, AUC-0.781). In SCAD patients with DM, levels of RP are associated with a higher risk of MACE, and inversely correlated with the risk of bleeding.