title: [Comparative study of 24-hour calciuria and urinary calcium/creatinine ratio in children over 4 years of age].
abstract: The relationship between 24 hour urinary calcium excretion (U Ca/24 h) and urinary calcium/creatinine ratio (U Ca/creat) measured for morning and evening urine samples was studied in 56 children aged 4-15 years and hospitalized for benign conditions. Depending on the length of hospitalisation, 1 to 3 determinations of U Ca/24 h and U Ca/creat ratio were carried out for each child. Mean +/- SD U Ca/24 h was 0.05 +/- 0.058 mmol/kg. Mean U Ca/Cr, expressed in mmol/mmol, was 0.368 for total 24 h urine, 0.358 for the morning sample and 0.358 for the evening sample respectively. A good correlation was found between U Ca/24 h and 24 h U Ca/Cr ratio (r = 0.89), morning U Ca/creat (r = 0.83) and evening U Ca/creat ratio (r = 0.81) respectively. It is concluded that determination of the U Ca/Cr ratio for morning or evening urine samples is an efficient means of detecting hypercalciuria.
authors.affiliation: Service de pédiatrie, hôpital Nord, CHU de St-Etienne, Saint-Priest-en-Jarez, France.
authors.forename: M P
authors.initials: MP
authors.lastname: Lavocat
authors.forename: M T
authors.initials: MT
authors.lastname: Freycon
authors.forename: M
authors.initials: M
authors.lastname: Muchrif
mesh_terms: D000293:Adolescent; D002118:Calcium / Q000652:urine*; D002648:Child; D002675:Child, Preschool; D003404:Creatinine / Q000652:urine*; D006801:Humans; D012016:Reference Values
chemical_list: D003404:Creatinine; D002118:Calcium
vernacular_title: Etude comparative de la calciurie de 24 heures et du rapport calcium/créatinine urinaire chez l'enfant de plus de 4 ans.