title: [Urinary calcium, magnesium and uric acid in normal children].
abstract: In a group of 327 normal children, aged 4 to 11, we measured Calcium (Ca) and Creatinine (Cr) in the second morning urine. In 226 of them, Magnesium (Mg) and Uric Acid (UA) were also calculated. Means and SD were respectively Ca/Cr: 0.11 +/- 0.09, Mg/Cr: 0.10 +/- 0.03, Mg/Ca: 1.56 +/- 1.48 and UA/Cr: 0.093 +/- 0.29. Distribution was not normal, so we used the 97.5 centile for the upper acceptable limit. This value was higher for Ca/Cr (0.37) and different for Mg/Cr (0.17), compared to the previous reports. Our values of Mg/Ca were related to age (p less than 0.01). These results suggest the need for local establishment of normal ranges and a better definition of hypercalciuria and hypermagnesiuria.
authors.affiliation: Unidade de Nefrologia Pediátrica, Hospital de Santa Maria, Universidade de Lisboa.
authors.forename: G
authors.initials: G
authors.lastname: Araujo e Sá
authors.forename: H
authors.initials: H
authors.lastname: Proença
authors.forename: L
authors.initials: L
authors.lastname: Sassetti
authors.forename: S
authors.initials: S
authors.lastname: Lopes
authors.forename: F B
authors.initials: FB
authors.lastname: Barros
authors.forename: F C
authors.initials: FC
authors.lastname: Rosa
mesh_terms: D002118:Calcium / Q000652:urine*; D016009:Chi-Square Distribution; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008274:Magnesium / Q000652:urine*; D008297:Male; D012016:Reference Values; D014527:Uric Acid / Q000652:urine*
chemical_list: D014527:Uric Acid; D008274:Magnesium; D002118:Calcium
vernacular_title: Calciúria, magnesiúria e uricosúria em crianças normais.