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. Author manuscript; available in PMC: 2014 Oct 1.
Published in final edited form as: Pediatr Nephrol. 2013 Jan 20;28(10):1923–1942. doi: 10.1007/s00467-012-2329-z
Random urine oxalate-to-creatinine (Ox/Cr) ratio by age [123-126]
Age Ox/Cr ratio Upper limit of normal
(mmol/mmol) (mg/mg)
<6 months 0.37 0.29
6 months to 2 years 0.26 0.20
>2 years to 5 years 0.14 0.11
6 to 12 years 0.08 0.063