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Ann Clin Biochem. 1990 Mar;27 ( Pt 2):110-3.

The relationship between serum cholesterol and serum thyrotropin, thyroxine and tri-iodothyronine concentrations in suspected hypothyroidism.

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1
Institute of Biochemistry, Royal Infirmary, Glasgow, Scotland.

Abstract

The relationship between serum cholesterol, thyrotropin, thyroxine and tri-iodothyronine was investigated in 1018 female patients over 40 years of age with suspected hypothyroidism. The correlation between serum thyrotropin and cholesterol (r = 0.398) and between thyroxine and cholesterol (r = -0.217) were both highly significant (P less than 0.001), but the correlation between tri-iodothyronine and cholesterol (r = -0.011) was not significant. Only in patients with a serum thyrotropin in excess of 40 mU/L was there a clinically appreciable increase in the serum cholesterol. In 139 patients treated for hypothyroidism by thyroxine replacement there was a highly significant correlation (P less than 0.001) between the decrease in serum thyrotropin and cholesterol (r = 0.593). The correlation between increase in serum thyroxine and decrease in cholesterol (r = -0.401) was also highly significant (P less than 0.001), but there was an even stronger correlation between the increase in serum tri-iodothyronine and the decrease in serum cholesterol (r = -0.529).

PMID:
2327707
DOI:
10.1177/000456329002700204
[Indexed for MEDLINE]

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