New research supports the current two-step approach to assessing thyroid function – thyroid-stimulating hormone (TSH) levels first then free thyroxine (fT4) only if TSH is outside the reference range. An analysis of more than 4,000 participants in the Busselton Health Study found the two-step approach could eliminate unnecessary fT4 testing in up to 93% of ...
Thyroid function testing left well alone
By Mardi Chapman
7 Jun 2018