ArticleClinical endocrinology2023
Different FT3/TSH correlation in acquired and congenital hypothyroid patients reveals a different hypothalamic set-point.
Article in Clinical endocrinology, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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2 citing papers in PubMed, 3 citations in OpenAlex.
- Approach to the Patient With Raised Thyroid Hormones and Nonsuppressed TSH.The Journal of clinical endocrinology and metabolism · 2024Article
- Different FT3/TSH correlation in acquired and congenital hypothyroid patients reveals a different hypothalamic set-point.Clinical endocrinology · 2023Article
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6 authors at 1 institution in 1 country.
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Abstract
objectiveTo understand differences in thyroid hormone replacement therapy with levo-thyroxine (l-T4) between acquired and congenital hypothyroid (CH) patients.
designWe compared biochemical thyroid parameters between euthyroid subjects (EU) and both CH adult patients and thyroidectomized patients (TP) under replacement therapy. PATIENTS AND MEASUREMENTS: A retrospective analysis was performed on a series of 98 consecutive adult CH patients (27 males and 71 females) with a median age of 24 years (range 18-58). Serum TSH, FT3, FT4, l-T4 dose and body weight were assessed. For comparison purposes, large series of 461 TP for thyroid cancer and 1852 EU followed at our Thyroid Clinic were used as control groups.
resultsThe daily weight-based l-T4 dose was significantly higher in CH than TP group (1.9 vs. 1.7 mcg/kg, p = .03). FT3/FT4 ratio was significantly higher in the EU group, intermediate in CH and lower in TP groups (0.32, 0.28 and 0.24, respectively). Linear regression analysis displayed an inverse correlation between FT4 and TSH in all the groups. An inverse correlation between FT3 and TSH was observed in the TP group, but not in the EU and CH group suggesting that CH patients, under replacement therapy, display biochemical thyroid parameters similar to EU subjects.
conclusionsAdult CH patients require a higher daily l-T4 dose than adult TP. However, the different correlation of TSH and FT3 values between CH and TP patients suggests an adaptive and different hypothalamic-pituitary-thyroid axis regulation that may depend on the early timing of the onset of hypothyroidism in CH.
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