[Use of the calcium-creatinine ratio in diagnosis and therapy]

E Ring, M Borkenstein
Pädiatrie und Pädologie 1987, 22 (3): 245-50
Hypercalciuria is a major cause of urolithiasis in adults and has reached increasing attendance in childhood. Traditionally urinary excretion of calcium is evaluated by 24-hour urine collection. Previous reports proposed the urinary calcium/urinary creatinine ratio (Ca/Cr-ratio) to diagnose hypercalciuric states. In 10 children with normocalciuria and 8 children with hypercalciuria the values of calcium excretion and Ca/Cr-ratio in a 24-hour urine collection were compared. 40 analyses showed a significant correlation (p = 0.001, r = 0.91) and hypercalciuria (urinary calcium greater than 4 mg/kg/day) is present if the Ca/Cr-ratio exceeds 0.23 (mg/mg). In 10 of the 18 patients the Ca/Cr-ratio of the 24-hour collection was compared with the Ca/Cr-ratio of a random urine sample collected 3 hours after breakfast. No significant difference was present. In 9 of 10 patients the correct diagnosis (normocalciuria or hypercalciuria) was possible by evaluation of this random urine sample. Our studies indicate that the evaluation of Ca/Cr-ratio in a random urine sample is a simple and reliable method to detect hypercalciuria and should be performed in all children with urolithiasis or unexplained hematuria. It is also a simple test for early detection of hypercalciuria in patients with long-term administration of vitamin D metabolites.

Full Text Links

Find Full Text Links for this Article


You are not logged in. Sign Up or Log In to join the discussion.

Related Papers

Available on the App Store

Available on the Play Store
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"