Normal urinary solute value in children based on measurements of solutes and creatinine from a single random urine collection

	Age	mg/mg	Age	mmol/mmol
Calcium/creatinine	0 to 6 mo	<0.8	0 to 6 mo	<2.24
	6 to 12 mo	<0.6	6 to 12 mo	<1.68
	2 to 18 yr	<0.2	2 to 18 yr	<0.56
Cystine/creatinine	All ages	<0.02	All ages	<0.01
Uric acid/glomerular filtration rate*	>3 yr	<0.56 mg uric acid/dL of glomerular filtrate	>3 yr	<0.03 mmol uric acid/dL of glomerular filtrate

mo: months; yr: years.
* Uric acid/glomerular filtration rate (GFR) calculated using the following equation, where UCr and PCr are the urine and plasma creatinine concentrations, respectively: Uric acid/GFR, mg/dL = Urine Uric Acid ÷ UCr x PCr.

Graphic 82389 Version 10.0

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