Different laboratories use varying reference ranges for thyroid antibodies

the verdict

SUPPORTED

the evidence backs this

Recorded sources

2 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Different laboratories and analytical assay platforms utilize varying reference limits and cutoffs for thyroid autoantibodies like TgAb and anti-TPO, meaning results cannot always be used interchangeably.

The analysis

The retrieved literature (specifically papers 1 and 7) directly supports the claim that thyroid antibody measurements exhibit high inter-method variability, significant differences in upper reference limits, and poor quantitative agreement across different commercial platforms and laboratories.

Evidence for · 2

Definition of the upper reference limit for thyroglobulin antibodies according to the National Academy of Clinical Biochemistry guidelines: comparison of eleven different automated methods

Recorded source metadata

Federica D’Aurizio, P. Metus, Anna Ferrari, Benedetta Caruso, R. Castello, D. Villalta, A. Steffan, K. Gaspardo, F. Pesente, N. Bizzaro, E. Tonutti, S. Valverde, C. Cosma, Mario Plebani, R. Tozzoli. Definition of the upper reference limit for thyroglobulin antibodies according to the National Academy of Clinical Biochemistry guidelines: comparison of eleven different automated methods. 2017. https://doi.org/10.1007/s13317-017-0096-3

Paper 1 demonstrates significant inter-method variability and wide variation in upper reference limits and cutoffs for thyroglobulin antibodies across multiple automated assay platforms and laboratories.

Source citation format

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More for · 1

Anti-thyroid peroxidase (TPO) antibodies – Comparative analysis of two automatic methods, ECLIA and CMIA

Recorded source metadata

I. Mănescu, A. Luca, A. Huțanu, Andreea Truța, M. Dobreanu. Anti-thyroid peroxidase (TPO) antibodies – Comparative analysis of two automatic methods, ECLIA and CMIA. 2024. https://doi.org/10.2478/rrlm-2024-0009

Paper 7 confirms that different analytical methods for anti-thyroid peroxidase (TPO) antibodies possess differing reference ranges and lack quantitative agreement, making them unsuitable for interchangeable monitoring.

Source citation format

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first checked02 Aug 2026

judged → SUPPORTED · 8402 Aug 2026

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