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Association of subclinical hypothyroidism with dyslipidemia and increased carotid intima-media thickness in children

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info:eu-repo/semantics/openAccess

Date

2017

Author

Ünal, Edip
Akın, Alper
Yıldırım, Ruken
Demir, Vasfiye
Yıldız, İsmail
Haspolat, Yusuf Kenan

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Citation

Ünal, E., Akın, A., Yıldırım, R., Demir, V., Yıldız, İ., Haspolat, Y. K. ve diğerleri. (2017). Association of subclinical hypothyroidism with dyslipidemia and increased carotid intima-media thickness in children. Journal of Clinical Research in Pediatric Endocrinology, 9(2), 144-149.

Abstract

Objective: Subclinical hypothyroidism (SH) is defined as an elevated serum thyroid-stimulating hormone (TSH) level with free thyroxine (fT4) level in the normal range. There are very few studies in the literature reporting on the effect of SH on lipid metabolism and carotid intima-media thickness (CIMT) in children. Methods: The study included 38 children diagnosed with SH and a control group comprising 38 healthy, euthyroid children. SH was diagnosed based on an elevated TSH level (4.2-20 mIU/L) and normal fT4 level measured in two morning fasting blood samples obtained at an interval of 2 to 6 weeks. Blood samples were collected by venipuncture in the morning after an overnight fast. Results: The patient group included 38 children (16 male, 22 female) with SH and the control group -38 healthy, euthyroid children (20 male, 18 female). Mean age was 8.1±3.6 (range, 3.5-15) years in the patient group and 8.9±2.4 (range, 4.5-15) years in the control group. In the patient group, total cholesterol (TC), low-density lipoprotein cholesterol (LDL-C), TC/high-density lipoprotein cholesterol (HDL-C), and LDL-C/HDL-C were higher compared to the control group (p=0.049, p=0.014, p=0.002, and 0.003, respectively). In the patient group, CIMT was also significantly higher compared to the control group (p=0.001). The patient group was further divided into two subgroups based on their serum TSH level: (I) patients with mildly elevated TSH (TSH=4.2±10 mIU/L) (n=33) and (II) patients with high TSH (TSH≥10 mIU/L) (n=5). However, no significant difference was found between the patients with mild and severe SH with regard to TC, LDL-C, HDL-C, triglyceride level and CIMT levels (p=0.635, p=0.424, p=0.310, p=0.342, and 0.610, respectively). Conclusion: Subclinical hypothyroidism leads to increased dyslipidemia (increased TC and LDL) and increased CIMT, which leads to increased risk of cardiovascular disease. Further studies are needed to substantiate these findings in children with SH.

Source

Journal of Clinical Research in Pediatric Endocrinology

Volume

9

Issue

2

URI

https://pubmed.ncbi.nlm.nih.gov/28008862/
https://hdl.handle.net/11468/8347

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  • Dahili Tıp Bilimleri Koleksiyonu [1399]



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