Table 2.

Acute kidney injury (AKI) stages by serum creatinine and urine output criteria^a among neonates hospitalized in the neonatal intensive care unit, 2013–2018.

	AKI by urine output
	Stage 0	Stage 1	Stage 2	Stage 3	Total
AKI by creatinine
Stage 0	108 (53.4)	3 (1.45)	16 (7.9)	4 (2.0)	131 (64.8)
Stage 1	25 (12.3)	0 (0)	8 (3.9)	1 (0.5)	34 (16.8)
Stage 2	8 (3.9)	0 (0)	4 (2.0)	6 (2.9)	18 (8.9)
Stage 3	11 (5.4)	1 (0.5)	3 (1.5)	4 (1.9)	19 (9.4)
Total	152 (75.2)	4 (2.0)	31 (15.3)	15 (7.4)	202 (100)

Data are presented as N (%). Shadowed area indicates infants with severe AKI (stages 2 and 3).

The classification was as per Kidney Disease: Improving Global Outcomes.

^aSee ref. ²⁶