Raised mortality in old adults with a history of hyperthyroidism following iodine fortification

A transient rise in the occurrence of hyperthyroidism ensued the introduction of iodine fortification (IF) of salt in Denmark. Older adults are at risk of complications to hyperthyroidism that could prove fatal to vulnerable individuals. We evaluated the association between thyroid function and mortality in older adults before and after nationwide implementation of IF.Retrospective cohort study.All 68-year-olds from the general population in the...