Non-thyroidal illness / thyroid dysfunction / abnormalities in the elderly hypothyroid patient (“When it’s not the thyroid”)

Drugs with an increased likelihood of inducing thyroid dysfunction.
Typical changes in thyroid function tests during the development of and recovery from nonthyroidal illness and their relationship to mortality. TSH, thyrotropin; TT3/TT4, total thyroid hormones; FT3/FT4, measured free thyroid hormone estimates; direct FT4, direct measurement of free T4 by dialysis or ultrafiltration = “True free T4”; rT3: reverse T3. Adapted from Demers and Spencer eds. (44).

Some situations in which serum TSH alone can give a false or uncertain indication of thyroid status in elderly people compared to the normal reference interval in young persons.

https://www.frontiersin.org/articles/10.3389/fendo.2021.641560/full

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https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6538219/

depression eller betydelig stressbelastning, binyrebarksinsufficiens, vitaminmangel (især. B-12 og / eller D-vitamin), anæmi, Diabetes Mellitus type 1, coeliaki, anden betydende sygdom, som ikke er optimalt behandlet.