This is a single center retrospective study of patients who underwent off pump coronary artery bypass surgery between 2016.11\~2023.05. From this patient group, preoperatively non-anemic patients were selected and were divided into 2 cohorts according to their preoperative iron status; iron replete and iron deficient. These two cohorts were compared to evaluate the effect of preoperative iron deficiency on patient outcomes. The primary end point was the occurrence of composite morbidity/mortality end points which were: in hospital mortality, acute kidney injury (AKI), stroke, deep sternal infection, hemostatic reoperation, prolonged mechanical ventilation of more than 24hours, delirium and postoperative myocardial infarction. Occurrence of any one of these outcomes counted as primary end point met. Secondary outcome was to evaluate and compare hemoglobin recovery of iron replete and deficient patients until one year after surgery.
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Number of participants with in hospital mortality, stroke, deep sternal infection, hemostatic reoperation, delirium
Timeframe: from the end of surgery until patient discharge (assessed up to day 60)
Number of participants with acute kidney injury
Timeframe: until 7 days after surgery
Number of participants with post operative myocardial infarction
Timeframe: until 48 hours post-surgery