Abstract Title:

Graves' hyperthyroidism and moderate alcohol consumption: evidence for disease prevention.

Abstract Source:

Clin Endocrinol (Oxf). 2012 Nov 21. Epub 2012 Nov 21. PMID: 23170908

Abstract Author(s):

Allan Carlé, Inge Bülow Pedersen, Nils Knudsen, Hans Perrild, Lars Ovesen, Lone Banke Rasmussen, Torben Jørgensen, Peter Laurberg

Article Affiliation:

Department of Endocrinology&Medicine, Aalborg Hospital, Aarhus University Hospital, Aalborg, Denmark.


BACKGROUND: We recently demonstrated that moderate alcohol consumption is associated with a considerable reduction in the risk of autoimmune hypothyroidism, similar to findings in other autoimmune diseases such as systemic lupus erythematosus and rheumatoid arthritis. We aimed to study a possible association between alcohol intake and autoimmune Graves' hyperthyroidism. DESIGN: population-based, case-control study METHODS: In a well-defined Danish population (2,027,208 person-years of observation), we prospectively identified patients with new overt thyroid dysfunction and studied 272 patients with Graves' hyperthyroidism. For each patient, we recruited four age-sex-region-matched controls with normal thyroid function (n=1,088). MEASUREMENTS: Participants gave detailed information on current and previous alcohol intake as well as other factors to be used for analyses. The association between alcohol intake and development of hyperthyroidism was analyzed in conditional multivariate Cox regression models. RESULTS: Graves' patients had a lower reported alcohol consumption than controls (median units of alcohol (12g) per week: 2 vs. 4, p<0.001). In a multivariate regression model, alcohol consumption was associated with a dose-dependent reduction in risk for development of overt Graves' hyperthyroidism. Odds ratios (95% confidence interval) compared to the reference group with a recent (last year) consumption of 1-2 units of alcohol per week were: 0 units/week 1.73 (1.17-2.56), 3-10 units/week 0.56 (0.39-0.79), 11-20 units/week 0.37 (0.21-0.65),≥21 units/week 0.22 (0.08-0.60). Similar results were found for maximum previous alcohol consumption during a calendar year. No interaction was found with type of alcohol consumed (wine vs. beer), smoking habit, age, sex, or region of inhabitancy. CONCLUSIONS: Moderate alcohol consumption is associated with a considerable reduction in the risk of Graves' disease with hyperthyroidism - irrespective of age and sex. Autoimmune thyroid disease seems to be much more dependent on environmental factors than hitherto anticipated. © 2012 Blackwell Publishing Ltd.

Study Type : Human Study

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