Keywords
urine samples
urinary creatinine
tube with preservative
tube without preservative
How to Cite
Abstract
The determination of urinary iodine is the most widely used biochemical marker to assess their concentrations, assisting in epidemiological studies and clinical medicina. This investigation evaluated the effects of the preservatives use in the urine samples collected into collector flasks before (A) and after (B) breakfast, and in the samples distributed into tubes either containing (C) or without (S) preservative on determining iodine and creatinine concentrations. The creatinine determination was performed to assess the renal function. This analysis included urine samples from 20 male and female individuals aged from 18 to 40 years. Agreements in the iodine concentrations were found in samples (A) showing an intraclass correlation coefficient (ICC) = 0.769 and ICC = 0.724 in tubes (C) and (S), respectively, and besides between (A) CCI = 0.941 and (B) ICC = 0.983. No agreement on the creatinine concentrations in the tubes (C) ICC = 0.369 and (S) ICC = 0.264 at both periods was observed, and no correlation between (A) (ICC = 0.916) and (B) (ICC = 0.998) as well. No effects was detected on the iodine concentrations in urine samples collected at both periods (A) and (B), and using either tube (C) or (S).References
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