Table 2.

Comparison of grading systems for AKI

System	Grade	Description
CTCAE	Grade 1	Higher than ULN to 1.5× ULN
	Grade 2	>1.5–3.0× baseline; >1.5–3.0× ULN
	Grade 3	>3.0× baseline; >3.0–6.0× ULN; hospitalization indicated
	Grade 4	>6.0× ULN; life-threatening consequences; RRT indicated
	Grade 5	Death
KDIGO	Stage 1	Increase in SCr of ≥0.3 mg/dl within 48 h or 1.5–1.9× baseline
	Stage 2	Increase in SCr to 2–2.9× baseline
	Stage 3	Increase in Cr to 3× baseline or to ≥4.0 mg/dl or initiation of RRT

CTCAE, Common Terminology Criteria for Adverse Events; ULN, upper limit of normal; SCr, serum creatinine.