Table 2.

Serial hourly comparisons of NGAL, creatinine, and urine output in no-AKI versus AKI groups.

Serial NGAL levels	No AKI	AKI	P value
NGAL (ng/mL)
Hour 4	80.25 ± 45.9	181.2 ± 104.9	0.002
Hour 12	89 ± 31	174.8 ± 70.6	0.0002
Hour 24	112.1 ± 64.11	193.69 ± 88.67	0.008
Creatinine
Hour 4	0.94 ± 0.38	1.00 ± 0.4	0.72
Hour 12	0.94 ± 0.36	1.13 ± 0.69	0.44
Hour 24	0.81 ± 0.24	1.12 ± 1.03	0.31
Urine output (mL/kg/h)
Hour 4	1.1 ± 1.3	0.61 ± 0.61	0.19
Hour 12	1.02 ± 0.74	0.58 ± 0.68	0.11
Hour 24	1.12 ± 0.8	1.10 ± 1.1	0.96

AKI = acute kidney injury; NGAL = neutrophil gelatinase– associated lipocalin.

Hour designation represents the mean values measured at those time points.