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Prevalence of iodine inadequacy in Switzerland assessed by the estimated average requirement cut-point method in relation to the impact of iodized salt

Haldimann, Max ; Bochud, Murielle ; Burnier, Michel ; Paccaud, Fred ; Dudler, Vincent

In: Public Health Nutrition, 2015, vol. 18, no. 8, p. 1333-1342

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    Titre
    • Prevalence of iodine inadequacy in Switzerland assessed by the estimated average requirement cut-point method in relation to the impact of iodized salt
    Auteur
    • Haldimann, Max. Federal Food Safety and Veterinary Office, Division of Risk Assessment, Laboratories, Schwarzenburgstrasse 155, 3003 Bern, Switzerland
    • Bochud, Murielle. Institute of Social and Preventive Medicine, Lausanne University Hospital, Lausanne, Switzerland
    • Burnier, Michel. Service of Nephrology and Hypertension, Lausanne University Hospital, Lausanne, Switzerland
    • Paccaud, Fred. Institute of Social and Preventive Medicine, Lausanne University Hospital, Lausanne, Switzerland
    • Dudler, Vincent. Federal Food Safety and Veterinary Office, Division of Risk Assessment, Laboratories, Schwarzenburgstrasse 155, 3003 Bern, Switzerland
    Type de document
    • Postprint
    Langue
    • Inglese
    Publié dans
    • Public Health Nutrition, 2015, vol. 18, no. 8, p. 1333-1342. Cambridge University Press
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:303036
    Summary
    Abstract Objective To assess the iodine status of Swiss population groups and to evaluate the influence of iodized salt as a vector for iodine fortification. Design The relationship between 24 h urinary iodine and Na excretions was assessed in the general population after correcting for confounders. Single-day intakes were estimated assuming that 92 % of dietary iodine was excreted in 24 h urine. Usual intake distributions were derived for male and female population groups after adjustment for within-subject variability. The estimated average requirement (EAR) cut-point method was applied as guidance to assess the inadequacy of the iodine supply. Setting Public health strategies to reduce the dietary salt intake in the general population may affect its iodine supply. Subjects The study population (1481 volunteers, aged ≥15 years) was randomly selected from three different linguistic regions of Switzerland. Results The 24 h urine samples from 1420 participants were determined to be properly collected. Mean iodine intakes obtained for men (n 705) and women (n 715) were 179 (sd 68·1) µg/d and 138 (sd 57·8) µg/d, respectively. Urinary Na and Ca, and BMI were significantly and positively associated with higher iodine intake, as were men and non-smokers. Fifty-four per cent of the total iodine intake originated from iodized salt. The prevalence of inadequate iodine intake as estimated by the EAR cut-point method was 2 % for men and 14 % for women. Conclusions The estimated prevalence of inadequate iodine intake was within the optimal target range of 2-3 % for men, but not for women