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Serum thyroglobulin before and after iodization of salt: an 11-year DanThyr follow-up study

  • Krejbjerg, Anne
  • Bjergved, Lena
  • Pedersen, Inge Bülow
  • Carlé, Allan
  • Knudsen, Nils
  • Perrild, Hans
  • Ovesen, Lars
  • Rasmussen, Lone Banke
  • Laurberg, Peter
Publication Date
Jan 01, 2015
Online Research Database In Technology
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Our objective was to investigate individual serum thyroglobulin (Tg) changes in relation to iodine fortification (IF) and to clarify possible predictors of these changes. We performed a longitudinal population-based study (DanThyr) in two regions with different iodine intake at baseline: Aalborg (moderate iodine deficiency (ID)) and Copenhagen (mild ID). Participants were examined at baseline (1997) before the mandatory IF of salt (2000) and again at follow-up (2008) after IF. We examined 2465 adults and a total of 1417 participants with no previous thyroid disease and without Tg-autoantibodies were included in the analyses. Serum Tg was measured by immunoradiometric method. We registered participants with a daily intake of iodine from supplements in addition to IF. Overall, the follow-up period saw no change in median Tg in Copenhagen (9.1/9.1 μg/l, P=0.67) while Tg decreased significantly in Aalborg (11.4/9.0 μg/l, P

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