| Random urine citrate-to-creatinine (Cit/Cr) ratio by age [120] | ||
| Age (yr) | Cit/Cr ratio Lower limit of normal | |
| mmol/mmol | mg/mg | |
| 0-5 | 0.25 | 0.42 |
| >5 | 0.15 | 0.25 |
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