Abstract

SERVETTO, Cristina et al. Survey on urinary iodine as iodine intake control . Acta bioquím. clín. latinoam. [online]. 2017, vol.51, n.4, pp.575-579. ISSN 0325-2957.

The presence of endemic goiter in Uruguay has decreased markedly since the addition of iodine to table salt in 1964. It was essential to evaluate the population levels of iodine intake accordingly to WHO specifications, since iodine support to the table salt has been modified twice. The aims of this study were to evaluate the levels of iodine in the population through the urinary iodine levels, select the best way to express their excretion and study the relationship thereof with urinary sodium. Four hundred ninety- one urine samples were analyzed from school children from nine states of Uruguay and sodium, creatinine and iodine were measured. The iodine median was 0.248 mg/L, an adequate value according to WHO specifications (0.100-0.300 mg/L). The expression of urinary iodine as the ratio between urinary iodine and urinary creatinine (mg/g) had a non-parametric distribution that discriminate the atypical values better than the urinary iodine (mg/L). The relationship between iodine excretion and sodium was poor (r2=0.199), indicating that the input of iodine does not come exclusively from table salt. Younger children had a greater excretion than older ones.

Keywords : Urinary iodine; Natriuresis and urinary iodine; Iodine intake.

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