OBSERVATIONS ON THE VARIABILITY OF CREATININE EXCRETION

  • 1 March 1986
    • journal article
    • research article
    • Vol. 40C  (2) , 125-129
Abstract
This paper reportes the intra-individual variability of creatinine excretion under conditions of variable food intake and stress. Urine collections over 24 h were made by six subjects for 24 d in the course of an expedition to the Colombian Andes. The average coefficient of variation (CV) of day-to-day creatinine excretion was 11.4 per cent and of N excretion 28 per cent. When the outputs were averaged by 3-d period the mean CV of creatinine excretion was reduced to 5.7 per cent. It is concluded that in metbolic studies the 3-d creatinine excretion is a useful index even when food intakes and other conditions are not controlled.

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