Figure 2: Weight-indexed CUF volume (ml/kg) is associated with AKI status (No AKI vs. AKI) and KDIGO AKI staging after elective cardiac surgery (P=0.00027).

CUF volumes that exceed 32.60ml/kg (Q3) display higher incidence of AKI and higher KDIGO stages-2 and-3 compared with CUF volumes below this value. AKI=Acute kidney injury; CUF=Conventional ultrafiltration; KDIGO=Kidney Disease Improving Global Outcomes criteria for AKI; Q3=Third/upper quartile.