Calciuria, magnesiuria and creatininuria--relation to age.
We assessed the concentration of calcium, magnesium and creatinine in 2715 samples of the first morning urine. The investigation comprised the following age groups: children one, two, four, six, ten and thirteen years old, and groups of adults aged 18-35, 36-49, 50-65, 66-75, 76-85 and 86-93 years. The choice was made by random selection of participants of both sexes from diverse regions of the Czech Republic. We found the age to have a marked influence on the value of calcium, magnesium and creatinine, including urinary concentration ratios of calcium/creatinine and magnesium/creatinine. The urinary calcium concentration was low both in the early and advanced age groups, while it reached peak values in subjects 18-35 years old. The urinary magnesium concentration was also age-dependent, with a maximum in children aged 4 years, and a subsequent decline with advancing age. The value of the ratio urinary calcium/creatinine and urinary magnesium/creatinine was highest in the youngest age group (1-4 years).
Simecková
A
A
Institute of Endocrinology, Prague, Czech Republic.
Zamrazil
V
V
Cerovská
J
J
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000375:Aging / Q000652:urine*; D002118:Calcium / Q000652:urine*; D002648:Child; D002675:Child, Preschool; D003401:Creatine / Q000652:urine*; D006801:Humans; D007223:Infant; D008274:Magnesium / Q000652:urine*; D008875:Middle Aged; D009994:Osmolar Concentration
D008274:Magnesium; D003401:Creatine; D002118:Calcium