Changes in the prevalence of hypothyroidism. The HUNT Study in Norway
BO Asvold, LJ Vatten, T Bjøro
DesignPopulation surveys of 33 917 individuals in 1995-97 and 49 180 individuals in 2006-08.
MethodsWe compared the prevalence of untreated overt, untreated subclinical, and treated hypothyroidism between 1995-97 and 2006-08.
ResultsThe prevalence of untreated overt hypothyroidism among women decreased by 84% from 1995-97 (0.75%) to 2006-08 (0.12%). The corresponding decrease among men was 43% from 0.21% to 0.12%. For untreated subclinical hypothyroidism, the prevalence among women decreased by 64% from 3.0% to 1.1%, and in men, the prevalence decreased by 54% from 2.1% to 1.0%.
Conversely, the prevalence of treated hypothyroidism among women increased by 60% from 5.0% to 8.0%, and in men, the corresponding prevalence doubled from 1.0% to 2.0%. The prevalence of any form of hypothyroidism remained essentially similar at 9% in women and 3% in men.
ConclusionsThe prevalence of untreated hypothyroidism in this Norwegian county strongly decreased from 1995-97 to 2006-08. The findings suggest that populations with easy access to thyroid function testing and levothyroxine treatment may now have a low prevalence of untreated hypothyroidism.
Lees ook over de Nord-Trøndelag Health Study op Schildkliertje
- Alun Stevens, Newsletter of Thyroid Australia, Volume 3 No 1 January 2002, p. 4-5
- T. Bjøro et al., Prevalence of thyroid disease, thyroid dysfunction and thyroid peroxidase antibodies in a large, unselected population. The Health Study of Nord-Trøndelag (HUNT)
© Alexander Witschge