Figure 1.

Flow diagram showing how many patients were excluded for each eligibility criterion and the number lost because of insufficient data available to apply the AKIN criteria. Some patients did not meet more than one eligibility criterion and some were lost because of insufficiency of more than one type of observation. ICU, intensive care unit; CABG, coronary artery bypass graft surgery; SCr, serum creatinine; eGFR, estimated GFR; AKIN, Acute Kidney Injury Network; SCr, serum creatinine, UO, urine output; RRT, renal replacement therapy.