Searchable abstracts of presentations at key conferences in endocrinology
Endocrine Abstracts (2010) 22 P826

ECE2010 Poster Presentations Thyroid (122 abstracts)

Evaluation of interrelationships between thyroid function, lipid profile, homocysteine and high sensitivity C-reactive protein in patients with autoimmune thyroiditis

Celestino Neves 1 , Marta Alves 1 , Miguel Pereira 1 , Ema Carvalho 1 , Isolina Pimentel 1 , Renata Ramalho 2 , Carmo Palmares 2 , Cristina Guimarães 2 , João Pedro Ramos 2 , Davide Carvalho 1 , Luís Delgado 2 & José Luís Medina 1


1Endocrinology Service, Faculty of Medicine, São João Hospital, University of Porto, Porto, Portugal; 2Immunology Service, Faculty of Medicine, São João Hospital, University of Porto, Porto, Portugal.


Background: Thyroid dysfunction and lipid profile are associated with cardiovascular disease in patients with autoimmune thyroiditis (AIT).

Objective: To evaluate the association between thyroid function, lipid concentrations, C-reactive protein (CRP) and homocysteine in patients with AIT.

Patients and methods: We assessed thyroid function tests, BMI, total cholesterol (TC), HDL-cholesterol, LDL-cholesterol, triglycerides (TG), apolipoprotein B (ApoB), apolipoprotein A1 (ApoA1), lipoprotein (a) [Lp (a)], homocysteine, CRP, folic acid and B12 vitamin in 500 patients with AIT, 93.6% female, with a mean age of 46.7±15.8 years old and BMI 27.0±5.4 kg/m2. Statistic analysis was done with ANOVA and Pearson correlation tests. Results are expressed as mean±SD or percentage. A P<0.05 was considered significant.

Results: We found significant positive correlations between TSH and TC (r=0.167; P<0.001), LDL-cholesterol (r=0.131; P=0.004), TG (r=0.168; P<0.001) and ApoB (0.141; P=0.008). BMI was positively correlated with free T4 (FT4) (r=0.125; P=0.005), ApoB (r=0.152; P=0.004), TG (r=0.193; P<0.001) and LDL-cholesterol (r=0.141; P=0.002), and was negatively correlated with HDL-cholesterol (r=−0.238; P<0.001), ApoA1 (r=−0.129; P=0.01) and FT3 (r=−0.103; P=0.02). We also found negative correlations between CRP and ApoA1 (r=−0.183; P=0.01), B12 vitamin (r=−0.158; P=0.005) and FT3 (r=−0.176; P<0.001), and significant positive correlations between CRP and folic acid (r=0.858; P<0.001), FT4 (r=0.168; P=0.001) and anti-TPO antibodies (r=0.120; P=0.01). We did not find significant correlations with homocysteine.

Conclusion: In patients with AIT the interrelationships between thyroid function and TC, LDL-cholesterol, TG, ApoB and CRP determine an increased cardiovascular risk. Thus, diagnostic and therapeutic strategies should be implemented to minimize the impact of AIT, which has a high prevalence in the general population.

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