ABSTRACT
OBJECTIVE: To develop a scoring system to predict acute kidney injury in Asian patients after coronary artery bypass grafting. DESIGN: A retrospective analysis of data collected in an institutional cardiac database. SETTING: A tertiary academic hospital in a large metropolitan city. PARTICIPANTS: The study comprised 954 patients with coronary artery disease. INTERVENTIONS: All patients underwent coronary artery bypass surgery with cardiopulmonary bypass but did not undergo any other concomitant procedures. MEASUREMENTS AND MAIN RESULTS: The main outcome measured was acute kidney injury as defined by the Acute Kidney Injury Network criteria. The following 6 clinical variables were independent predictors of kidney injury: age>60 years, diabetes requiring insulin, estimated glomerular filtration rate<60 mL/min/1.73 m(2), ejection fraction<40%, cardiopulmonary bypass time>140 minutes, and aortic cross-clamp time>100 minutes. These variables were used to develop the Singapore Acute Kidney Injury score. CONCLUSION: The Singapore Acute Kidney Injury score is a simple way to predict, at the time of admission to the intensive care unit, an Asian patient's risk of developing acute kidney injury after coronary artery bypass surgery.
