title: [Evaluation of urinary calcium/creatinine ratio in premature and full-term newborn infants].
abstract: Urinary calcium/creatinine ratio (U Ca/creat) was studied in infants, term and preterm newborn babies. In 31 1.5-24 months old healthy infants, the median U Ca/creat was 0.16 mmol/mmol (range 0.013-1.17) and was similar to the value obtained in children older than 4 years. In 55 healthy full-term newborns studied in the first week of life, the median U Ca/creat was 0.12 mmol/mmol. However the range of values was extremely wide (0.0006-4.75), suggesting that the U Ca/creat ratio is of little interest to screen for hypercalciuria during the neonatal period. In 31 premature newborns, the median U Ca/creat was 1.08 mmol/mmol, a value significantly higher than in the two other groups (P < 0.001); as in the term newborns there was a very wide range of values (0.057-6.83). However after excluding the premature babies with elevated serum 25 OHD level, this difference was not statistically significant.
authors.affiliation: Service de pédiatrie, hôpital Nord, Saint-Etienne, France.
authors.forename: M P
authors.initials: MP
authors.lastname: Lavocat
authors.forename: V
authors.initials: V
authors.lastname: Breant
authors.forename: F
authors.initials: F
authors.lastname: Durr
authors.forename: J
authors.initials: J
authors.lastname: Frey
authors.forename: M T
authors.initials: MT
authors.lastname: Freycon
authors.forename: M N
authors.initials: MN
authors.lastname: Varlet
mesh_terms: D000367:Age Factors; D002118:Calcium / Q000652:urine*; D003404:Creatinine / Q000652:urine*; D005865:Gestational Age; D006801:Humans; D006887:Hydroxycholecalciferols / Q000097:blood; D007223:Infant; D007231:Infant, Newborn; D007234:Infant, Premature / Q000652:urine*
chemical_list: D006887:Hydroxycholecalciferols; D003404:Creatinine; D002118:Calcium
vernacular_title: Evaluation du rapport calcium/créatinine urinaire chez le nourrisson et le nouveau-né à terme et prématuré.