<qa>  What is the main predictor of mortality?Acute Kidney Injury AKI develops in 88 to 30 of critically ill patients admitted to an intensive care unit. While AKI of any severity is a strong predictor of mortality 1-4, both morbidity and mortality increase with increasing severity of renal injury2. Therefore any management strategy that prevents progression of renal risk to injury or failure has the potential to improve outcomes in these patients. 