Reference Intervals of Spot Urine Creatinine-to-Osmolality Ratio as a Surrogate of Urinary Creatinine Excretion Rate

Table 2

Laboratory data ().

	(range)
Blood biochemistry
Urea nitrogen, mg/dL	(2-57)
Creatinine, mg/dL	(0.38-7.46)
MDRD eGFR, ml/min/1.73 m^2	(7.4-206.9)
Albumin, g/dL	(3.5-5.5)
GOT, IU/L	(7-120)
GPT, IU/L	(5-116)
Total bilirubin, mg/dL	(0.1-2.0)
Uric acid, mg/dL	(0.4-11.0)
CPK, IU/L	(21-1488)
Glucose, mg/dL	(47-526)
Osmolality, mOsm/kg	(270-299)
Na, meq/L	(135-144)
K, meq/L	(3.5-5.5)
Ca, mg/dL	(8.0-11.3)
P, mg/dL	(1.6-6.6)
Urine profile
Creatinine, mg/dL	(5-641)
Osmolality, mOsm/kg	(59-1292)
sUCr/Osm	(0.02-0.90)
UACR, mg/g	(0.61-13333)

Abbreviations: CPK: creatine phosphokinase; GOT: glutamic oxaloacetic transaminase; GPT: glutamic pyruvic transaminase; MDRD eGFR: estimated glomerular filtration rate derived with Modification of Diet in Renal Disease (MDRD) Study equation; SD: standard deviation; sUCr/Osm: spot urine creatinine-to-osmolality ratio; UACR: urine albumin-to-creatinine ratio. To convert albumin to g/L, multiply by 10; Ca to mmol/L, 0.25; creatinine to μmol/L, 88.4; glucose to mmol/L, 0.0555; P to mmol/L, 0.323; total bilirubin to μmol/L, 17.1; urea nitrogen to mmol/L, 0.357; and uric acid to mmol/L, 0.059.