Endocrine practice : official journal of the American College of Endocrinology and the American Association of Clinical Endocrinologists · 2022
Thyroid-Stimulating Antibody/Thyroid-Stimulating Hormone Receptor Antibody Ratio as a Sensitive Screening Test for Active Graves' Orbitopathy.
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Nakano Masayoshi, Konishi Hiroe, Koshiba Masahiro
Аннотация
OBJECTIVE: Graves' orbitopathy (GO), an extrathyroidal manifestation of Graves' disease, can seriously threaten a patient's quality of life. Given that immunosuppressive treatment during the early active phase of GO has been found to reduce both disease activity and severity, sensitive screening tests are needed.
METHODS: The present study included 86 patients with GO, in whom serum levels of thyroid-stimulating hormone (TSH), free triiodothyronine (T3), free thyroxine, thyroid-stimulating antibody, TSH receptor antibody, thyroid peroxidase antibody, thyroglobulin, and thyroglobulin antibody were measured within 2 months before magnetic resonance imaging (MRI) for orbit assessment.
RESULTS: The thyroid-stimulating antibody/TSH receptor antibody ratio was able to distinguish MRI results with a correct classification rate of 81%. When focusing on patients without T3 predominant Graves' diseases, the ratio distinguished MRI results at a rate of 92%. Receiver operating characteristic curve analysis revealed a cutoff antibody ratio of 87, which yielded a sensitivity, specificity, positive likelihood ratio, and negative likelihood ratio of 91%, 95%, 18.2, and 0.0957, respectively, for distinguished MRI results.
CONCLUSIONS: The thyroid-stimulating antibody/TSH receptor antibody ratio is a highly sensitive and specific indicator for active GO, especially in patients without T3 predominance, and serves as a good screening test for active GO in primary care settings.
METHODS: The present study included 86 patients with GO, in whom serum levels of thyroid-stimulating hormone (TSH), free triiodothyronine (T3), free thyroxine, thyroid-stimulating antibody, TSH receptor antibody, thyroid peroxidase antibody, thyroglobulin, and thyroglobulin antibody were measured within 2 months before magnetic resonance imaging (MRI) for orbit assessment.
RESULTS: The thyroid-stimulating antibody/TSH receptor antibody ratio was able to distinguish MRI results with a correct classification rate of 81%. When focusing on patients without T3 predominant Graves' diseases, the ratio distinguished MRI results at a rate of 92%. Receiver operating characteristic curve analysis revealed a cutoff antibody ratio of 87, which yielded a sensitivity, specificity, positive likelihood ratio, and negative likelihood ratio of 91%, 95%, 18.2, and 0.0957, respectively, for distinguished MRI results.
CONCLUSIONS: The thyroid-stimulating antibody/TSH receptor antibody ratio is a highly sensitive and specific indicator for active GO, especially in patients without T3 predominance, and serves as a good screening test for active GO in primary care settings.