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–pituitary–thyroid (HPT) axis ( 19 ). Laclaustra et al. proposed a novel approach for calculating the thyroid hormone central sensitivity index, the thyroid feedback quantile-based index (TFQI FT4 ), which utilizes FT4 and TSH levels ( 20 ). Additional thyroid hormone
Department of Endocrinology, Shengjing Hospital, China Medical University, Shenyang, Liaoning, China
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Department of Laboratory Medicine, The First Affiliated Hospital of China Medical University, Heping District, Shenyang, Liaoning, China
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Department of Endocrinology, Shengjing Hospital, China Medical University, Shenyang, Liaoning, China
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based on patients with normal thyroid function. Therefore, abnormal TSH levels, especially regarding the relationship between elevated TSH status and TH sensitivity, are worth discussing. The thyroid feedback quantile-based index (TFQI) is a new index