Acute kidney injury in traumatic brain injury intensive care unit patients

Table 4 Stages of acute kidney injury according to each classification

Stages, n (%)	KDIGO	AKIN	RIFLE	CK	P value
Stage 0	1357 (82.3)	1365 (82.9)	1439 (87.3)	1458 (88.5)	0.967
Stage 1	200 (12.1)	199 (12.1)	118 (7.2)	103 (6.3)	0.370
Stage 2	53 (3.2)	49 (3.0)	57 (3.5)	51 (3.1)	0.998
Stage 3	38 (2.3)	34 (2.1)	34 (2.1)	35 (2.1)	> 0.99

Stage 0 is considered as no-acute kidney injury. Data are shown as n (%) or mean ± SD. P values < 0.05 were considered statistically significant. KDIGO: Kidney Disease Improving Global Outcomes; AKIN: Acute Kidney Injury Network; RIFLE: Risk, Injury, Failure, Loss of kidney function, and End-stage kidney disease; CK: Creatinine kinetics.