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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 magnesium-to-creatinine (Mg/Cr) ratio by age [119]
Age (yr) Mg/Cr ratioUpper limit of normal
mmo/mmol mg/mg
0-1 2.2 0.48
1-2 1.7 0.37
2-3 1.6 0.34
3-5 1.3 0.29
5-7 1.0 0.21
7-10 0.9 0.18
10-14 0.7 0.15
14-17 0.6 0.13