Endocrine Abstracts

Objectives: Iodine fortification (IF) induces an initial increase followed by a decrease in the incidence of hyperthyroidism in the population. Also, the sex-, age-, and subtype distribution of hyperthyroid cases changes after IF. The risk of atrial fibrillation (AF) in hyperthyroid patients is influenced by these factors. Therefore, we aimed to examine how the association between incident hyperthyroidism and atrial fibrillation was affected by an IF increasing the population ...

Background: Few studies have scrutinized the spectrum of symptoms in subclinical hypothyroidism.Methods: From three DanThyr cross-sectional surveys performed in the period 1997 to 2005, a total of 8,903 volunteers participated in a comprehensive investigation including blood samples and questionnaires on previous diseases, smoking habits, alcohol intake, and education. From the three surveys we included patients with unknown subclinical hypothyroidism (<...

Objectives: Hyperthyroidism in pregnant women is a clinical concern, and it is important to surveil any change in the occurrence of hyperthyroidism within the pregnant population specifically, especially when a mandatory iodine fortification (IF) program is implemented as it was in Denmark in the year 2000. This longitudinal study aimed to investigate any change in the use of antithyroid drugs (ATD) for the treatment of hyperthyroidism in Danish pregnant women during a 20-year...

Objectives: One of the risk-based screening criteria for thyroid disease in pregnancy is previous abnormal thyroid function or thyroid autoantibody-positivity. We speculated on the frequency and results of thyroid function testing in women of fertile age as part of routine care before and after a pregnancy.Methods: The North Denmark Region Pregnancy Cohort includes retrospective assessment of thyroid function and thyroid autoantibodies (ADVIA Centaur XPT...

Objectives: Thyroid disease in women of reproductive age is predominantly of autoimmune origin, and thyroid peroxidase antibodies (TPO-Ab) as well as thyroglobulin antibodies (Tg-Ab) are key markers of autoimmune hypothyroidism. Adding to this, much focus in pregnancy is on euthyroid women who are positive for thyroid autoantibodies. The observational findings are diverse, and evidence to substantiate the applied cut-offs for definition of thyroid autoantibody-positivity in ea...