Participants were included based on T4 within the reference range and TSH either within (euthyroid; n=15) or above (subclinical hypothyroidism; n=20) the laboratory reference range on two independent blood samplings before inclusion. Exclusion criteria were known thyroid disease or use of thyroid ...
Gestation-specific scatter plots of TSH levels for the three trimesters, including six subgroups. A First trimester; B Second trimester; C Third trimester. The first half of the trimesters are represented with round markers and the second half with square markers. Loess nonparametric trend curves...
According to laboratory tests, thyroid dysfunction can be classified as overt, with both abnormal TSH and free T4 (FT4) levels, or as subclinical, with abnormal TSH but normal FT4 levels. Some studies have demonstrated a relationship between overt thyroid disease and cognitive disturbances11,12. ...
TSH levels decline rapidly during the first week of life in most children, but may remain transiently elevated in a few individuals despite normal free T4 levels. For proper interpretation of an abnormal TSH from a newborn thyroid screen, a Free T4 by Dialysis (test code 35167) or To...
Mild deviation of thyroid function within the reference range has been observed in obese individuals, such as elevated serum thyroid-stimulating hormone (TSH) level and high transformation of thyroxine (T4) to triiodothyronine (T3) (8, 9, 10). Serum TSH and free triiodothyronine (FT3) levels ...
Tsai:Our primary care colleagues can do a workup and interpretation of thyroid function tests in most cases. In the situations where the thyroid function test results are discordant (ie, elevated TSH and elevated free T4 levels or low TSH and low free T4 levels) or difficult to interpret, ...
However, it's crucial to remember that these reference ranges can vary between laboratories, and the interpretation of thyroid hormone levels should be done in conjunction with clinical evaluation and consideration of the individual's specific circumstances. It is recommended to consult with a healthca...
This is a brief summary of lab value interpretation and is not intended in any way to be comprehensive or replace any conversation of your results with your doctor. THYROID LAB VALUESA TSH (Thyroid Stimulating Hormoone) Test is performed to assess the activity of the thyroid gland. It involve...
High serum cholesterol levels in persons with 'high-normal' TSH levels: should one extend the definition of subclinical hypothyroidism? Eur J Endocrinol 1998;138:141-5. Beck-Peccoz P, Brucker-Davis F, Persani L, Smallridge RC and Weintraub BD. Thyrotropin-secreting pituitary tumors. Endocrine ...
Interpretation of thyroid function tests and their relationship to iodine nutrition: changes in TSH, free T4, and free T3 resulting from iodine deficiency and iodine excess. In: Preedy VR, Burrow GN, Watson RR, editors. Comprehensive handbook of iodine: nutritional, biochemical, pathological and ...