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PubMed · 402701

Free thyroxine index or effective thyroxine ratio?

P R Pannall
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Abstract

The ability of the free thyroxine index (FTI) and the effective thyroxine ratio (ETR) to distinguish abnormal from normal thyroid function is compared in a series of 422 patients; they were equally successful in detecting hyperthyroidism. In hypothyroidism, however, the ETR values of 22% were within 95% 'normal' limits compared with 7,4% of the FTI values. Other authors have shown a similar poorer sensitivity of the ETR compared with the FTI.

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HumansHyperthyroidismHypothyroidismThyroid Function TestsThyroxineThyroxine-Binding ProteinsComparative StudyJournal Article

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P R Pannall. 1977-02-05. Free thyroxine index or effective thyroxine ratio?. https://pubmed.ncbi.nlm.nih.gov/402701/

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