Comparison of 2 assays for measuring serum total thyroxine concentration in dogs and cats.
Ewan D S WolffGraham BilbroughGeorge E MooreLynn GuptillJ Catharine Scott-MoncrieffPublished in: Journal of veterinary internal medicine (2020)
Differences in CTT4 and MTT4 results affect interpretation at higher serum TT4 concentrations. The ITT4 proportional bias will underestimate serum TT4 concentrations in dogs and cats, compared to MTT4. Serial TT4 measurements should be done using the same assay.
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