Urinary creatinine excretion and lean body mass

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ABSTRACT

In a group of 34 adult and child subjects a high correlation (r = 0.988) was found between lean body mass, as determined by potassium-40 counting, and urinary creatinine excretion. The effect of technical errors was reduced by averaging the results of two or three 40K assays on each subject, and by making consecutive 3-day collections of urine. It appears that one can make a reasonable estimate of lean body mass from urinary creatinine excretion.

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    Present address: Sophia Children's Hospital, Rotterdam, The Netherlands.

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