[Urinary excretion of calcium, uric acid and citrate in healthy children and adolescents].

Objective: To obtain regional reference values for calcium, uric acid and citrate urinary excretion and establish a correlation between those excretions in 24-hour urine sample and single urine sample for their use in clinical practice.

Methods: A hundred and twenty-five healthy children and adolescents were randomly chosen and submitted to the following protocol: clinical examination, biochemical analysis of blood, blood cell count, parathormone, 24-hour urine, fasting urine sample and stool test.

Results: The maximum value of calcium excretion in 24-hour urine was 3.