Group A(n=32) Group B(n=41) p-value Age (yr) 72.5±6.4 75.5±6.9 0.062 Gender(M/F) 19/13 28/13 0.468 Preoperative       Body weight(Kg) 57.6±11.2 57.4±12.7 0.935 HbA1c(%NGSP) 6.23±1.17 5.93±0.95 0.193 Ejection Fraction (%) 48.5±16.2 50.3±17.8 0.655 eGFR(mL/min/1.73m2) 46.1±19.6 32.9±15.3 0.001 Intraoperative       Emergency surgery(yes/no) 10/22(31%) 15/26(37%) 0.804 Surgery       CABG 19(59%) 24(59%) 1 Valve surgery 8(25%) 12(29%) 0.793 CABG + valve 5(16%) 5(12%) 0.739 Duration of surgery(hr) 8.08±185 7.51±1.87 0.197 IABP(yes/no) 17/15(53%) 18/23(44%) 0.484 At the start of CRRT       Increases in Scr (x) 1.95±0.79 1.65±0.58 0.071 Urine volume(mL/hr/Kg) 0.53±0.44 0.67±0.49 0.22 Changes in body weight (%) 9.08±5.41 9.49±7.18 0.788 CVP(mmHg) 10.9±3.8 9.8±3.9 0.209 SOFA score 12.2±2.4 11.2±2.1 0.084

Values are expressed as mean + standard deviation. eGFR, estimated glomerular filtration rate; CABG, Coronary artery bypass grafting; IABP, intra-aortic balloon pump; Scr, serum creatinine; CVP, central venous pressure; SOFA, sequential organ failure assessment.

Table 1: Demographic and clinical characteristics of acute kidney injury patients requiring continuous renal replacement therapy (CRRT) who had supported (Group A) or not supported (Group B) by mechanical ventilator at timing ofcessation of CRRT.