Thyroid function testing left well alone

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 ...

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