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  • Title: Low-density lipoprotein cholesterol in subclinical hypothyroidism.
    Author: Vierhapper H, Nardi A, Grösser P, Raber W, Gessl A.
    Journal: Thyroid; 2000 Nov; 10(11):981-4. PubMed ID: 11128726.
    Abstract:
    The significance of subclinical hypothyroidism in regard to ensuing hyperlipidemia remains unclear. Because an unfavorable lipid profile would provide a possible explanation for the reported association of coronary-heart disease with this syndrome, we have evaluated the relationship of thyrotropin (TSH) with total cholesterol, low-density-lipoprotein (LDL) cholesterol, and triglycerides in patients with normal thyroid function (n = 4886) as well as subclinical (n = 1055) and manifest (n = 92) hypothyroidism. Serum concentrations of LDL cholesterol were similar in euthyroid persons (134+/-39 mg/dL) and in patients with subclinical hypothyroidism (137+/-40 mg/dL) but were higher (178+/-70 mg/dL, p < 0.01) in overt hypothyroidism. Within the group of subjects with subclinical hypothyroidism there was no apparent relationship between serum concentrations of TSH ranging from 4.0 to 49.0 microU/mL and concentrations of LDL cholesterol. Thus, there is no "threshold value" of TSH in these patients per se necessitating substitution therapy with thyroxine.
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