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Revista chilena de nutrición

On-line version ISSN 0717-7518

Abstract

MUZZO B, Santiago et al. IODINE NUTRITION STATUS IN SCHOOL AGE CHILDREN OF AN AREA OF HIGH IODINE INTAKE (CALAMA) COMPARED WITH AN AREA OF NORMAL INTAKE (PUNTA ARENAS). Rev. chil. nutr. [online]. 2005, vol.32, n.1, pp.28-35. ISSN 0717-7518.  http://dx.doi.org/10.4067/S0717-75182005000100003.

Goiter prevalence determined by palpation of thyroid gland was evaluated in 1296 primary school age children from an area of high iodine intake (Calama) and compared with an area of normal iodine intake (Punta Arenas). Urinary iodine excretion and plasmatic thyroid hormones were measured in 10% of school children. In both areas 148 samples of salt for human consumption were randomly selected to measure iodine concentration. A goiter prevalence of 11,1% (10,0% in males and 12,5% in females) mainly goiter grade Ia (7,2%), without differences per area (11,6% in Calama and 10,6% in Punta Arenas) was found. Iodine concentration in salt for human consumption at both areas was adequated according the present Food Sanitary Regulation (FSR) in Chile (33,3 (gI/g salt in Calama, and 34,0 in Punta Arenas). Urinary iodine excretion was significantly higher in Calama (460 ( 190 (g I/L) than in Punta Arenas (273 ( 155 (g I/L). No differences were detected in T4 and TSH plasma levels (Calama 7.1 ( 1.5 and 3.3 (1.8; and Punta Arenas 7.2 ( 1.1 and 2.9 ( 1.2 respectively), while T3 plasma levels were significantly higher in Punta Arenas (103.9 ( 33.1 y 145.0 ( 26.0 respectivamente, p<0.001) . Only a tendency to a higher goiter prevalence with persistent and significantly higher urinary iodine excretion in children at Calama was observed, suggesting an extra source of iodine in this area, with an unkown origen that must be investigated

Keywords : endemic goiter; autoinmune tiroiditis; urinary iodine excretion; iodine intake; school age children.

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