Iodine deficiency in a population causes increased prevalence of goiter and, more importantly, may increase the risk for intellectual deficiency in that population.
The National Health and Nutrition Examination Surveys [NHANES I (1971-1974) and (NHANES III 11988-1994) ] measured urinary iodine (UI) concentrations.
UI concentrations are an indicator of the adequacy of iodine intake for a population.
The median UI concentrations in iodine-sufficient populations should be greater than 10 mug/dL, and no more than 20% of the population should have UI concentrations less than 5 mug/dL.
Median UI concentrations from both NHANES I and NHANES III indicate adequate iodine intake for the overall U.S. population, but the median concentration decreased more than 50% between 1971-1974 (32.0 ± 0.6 mug/dLJ and 1988-1994 (14.5 ± 0.3 mug/dLJ.
Low UI concentrations (<5 mug/dLJ were found in 11.7% of the 1988-1994 population, a 4.5-fold increase over the proportion in the 1971-1974 population.
The percentage of people excreting low concentrations of iodine (UI,<5 mug/dL) increased in all age groups.
In pregnant women, 6.7%, and in women of child-bearing age, 14.9% had UI concentrations below 5 mug/dL.
The findings in 1988-1994, although not indicative of iodine deficiency in the overall U.S. population, define a trend that must be monitored.
Mots-clés Pascal : Iode, Consommation alimentaire, Variation temporelle, Excrétion, Urine, Valeur limite, Etat nutritionnel, Déficit, Etude comparative, Sexe, Statut économique, Epidémiologie, Etats Unis, Amérique du Nord, Amérique, Homme
Mots-clés Pascal anglais : Iodine, Food intake, Time variation, Excretion, Urine, Boundary value, Nutritional status, Deficiency, Comparative study, Sex, Economic status, Epidemiology, United States, North America, America, Human
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 98-0504392
Code Inist : 002B30A01A2. Création : 19/02/1999.