Цитата:
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Although a 24-hour collection is best, random urine calcium measurement can be performed and is expressed in relation to creatinine. A normal reference interval for the urine calcium (mg/dL):urine creatinine (mg/dL) ratio is <0.14. Values exceeding 0.20 are found in patients with hypercalciuria. In children, the calcium:creatinine ratio decreases steadily with time until approximately age 6. It is important to note this fact since most children will be falsely flagged as hypercalciuric using adult cut-offs.
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Urine Calcium: Laboratory Measurement and Clinical Utility - Kevin F. Foley, PhD, DABCC; Lorenzo Boccuzzi, DO - Lab Med. 2010;41(11):683-686 ([
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