title: Morning magnesiuria: relation to age and sex.
abstract: Magnesium, calcium and creatinine concentration were assessed in the morning urine sample of 1710 subjects randomly selected from the population register in the Czech Republic: children aged 6, 10 and 13 years old and adults in age groups 18-35 years, 36-50 years, and 51-65 years of adults. The groups comprised 911 females and 799 males. There was a marked impact of age on the urinary magnesium concentration in both sexes, the concentration declining with advancing age. The child groups differed significantly from the adults. The urinary magnesium/creatinine ratio declined with age with the exception of the oldest group. The urinary calcium concentration did not change significantly with age in women or men. There was a weak age dependence in the calcium/creatinine ratio.
authors.affiliation: Institute of Endocrinology, Prague, Czech Republic.
authors.forename: A
authors.initials: A
authors.lastname: Simeková
authors.forename: V
authors.initials: V
authors.lastname: Zamrazil
authors.forename: J
authors.initials: J
authors.lastname: Cerovská
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000375:Aging / Q000378:metabolism* / Q000652:urine; D002118:Calcium / Q000652:urine; D002648:Child; D003404:Creatinine / Q000652:urine; D018153:Czech Republic; D005260:Female; D006801:Humans; D008274:Magnesium / Q000652:urine*; D008297:Male; D008875:Middle Aged; D012016:Reference Values
chemical_list: D003404:Creatinine; D008274:Magnesium; D002118:Calcium