Table 3. Blood Gas Analysis and Biochemical Values ^a.

	ARF	CRF	P Value
pH	7.35 ± 0.73b	7.28 ± 0.91	t = 3.95, P = 0.000c
pO2	90.0 (20.03)d	89.0 (21.15)	z = -0.22, P = 0.822e
pCO2	35.8 (13.35)	36.5 (15.25)	z = -0.40, P = 0.968e
HCO3	18.17 ± 5.39	16.87 ± 4.38	t = 1.11, P = 0.268c
K	4.77 ± 0.95	5.14 ± 1.14	t = -1.54, P = 0.126c
BUN	153.46 ± 82.47	169.40 ± 93.94	t = -0.79, P = 0.430c
Creatinine	2.84 (2.95)	4.78 (4.32)	z = -3.03, P = 0.001e
NGAL	261.50 (291)	428.50 (294)	z = -2.52, P = 0.012e

^aAbbreviations: AFR; acute renal failure, BUN; blood urea nitrogen, CFR; chronic renal failure, NGAL; neutrophil gelatinase-associated lipocalin.

^bMean ± SD.

^cMedian (IQR).

^dStudent T test.

^eMann-Whitney U test.