ISSN: 1308-5727 | E-ISSN: 1308-5735
Volume: 15 Issue: 4 Year: 2023

Abstracting & Indexing
Turkish Society for Pediatric Endocrinology and Diabetes
Is Waist-height Ratio Associated with Thyroid Antibody Levels in Children with Obesity? [J Clin Res Pediatr Endocrinol]
J Clin Res Pediatr Endocrinol. 2021; 13(2): 152-159 | DOI: 10.4274/jcrpe.galenos.2020.2020.0170

Is Waist-height Ratio Associated with Thyroid Antibody Levels in Children with Obesity?

Bahar Özcabi1, Gürkan Tarçın1, Esma Şengenç1, Feride Tahmiscioğlu Bucak1, Oya Ercan1, İbrahim Murat Bolayırlı2, Olcay Evliyaoğlu1
1İstanbul University-Cerrahpaşa, Cerrahpaşa Faculty of Medicine, Department of Pediatrics, Division of Pediatric Endocrinology, İstanbul, Turkey
2İstanbul University-Cerrahpaşa, Cerrahpaşa Faculty of Medicine, Department of Medical Biochemistry, İstanbul, Turkey

Objective: Obesity is known to affect thyroid function. Recently, waist-height ratio (WHtR) has been considered as a useful marker of subclinical hypothyroidism in obese cases, but its relation with thyroid autoimmunity still remains unclear. We evaluated the effect of body fat mass, WHtR, and metabolic parameters on thyroid autoantibody levels in children with obesity.
Methods: This was a cross-sectional study carried out with an obese [n=56, male/female (M/F): 29/26] and a healthy group (n=38, M/F: 19/19). All subjects underwent anthropometric measurements, laboratory investigations for thyroid function tests, thyroid peroxidase (TPO-ab) and thyroglobulin-antibodies (Tg-ab), transaminases, blood glucose, insulin levels, and lipids after overnight fasting; homeostatic model assessment for insulin resistance (HOMA-IR) was calculated for assessment of insulin resistance. Fat mass was estimated by multiple frequency bioimpedance analysis in the obese group, which was further divided into two subgroups according to the median of WHtR. All parameters were compared between the groups/subgroups.
Results: In the obese group, weight, height, body mass index (BMI), free triiodothyronine, thyrotropin, TPO-ab, insulin, low density lipoprotein-cholesterol, total cholesterol, alanine aminotransferase levels, and HOMA-IR were significantly higher than the controls group (p<0.05 for all). Median of WHtR was 0.6 in the obese group. In the “WHtR >0.6” subgroup (n=28), weight, BMI, fat mass, TPO-ab, Tg-ab, insulin and triglyceride levels were higher than WHtR ?0.6 subgroup (p<0.05). A positive correlation was obtained between Tg-ab and WHtR (rho=0.28, p=0.041).
Conclusion: Euthyroid children with obesity and a WHtR >0.6 are likely to have higher thyroid antibody levels, and Tg-ab levels have a positive correlation with WHtR, which reveals an association of central adiposity with thyroid autoantibody levels in these cases.

Keywords: Free thyroxine, free triiodothyronine, thyroglobulin antibody, thyroid peroxidase antibody, thyroid stimulating hormone, waist-height ratio

Bahar Özcabi, Gürkan Tarçın, Esma Şengenç, Feride Tahmiscioğlu Bucak, Oya Ercan, İbrahim Murat Bolayırlı, Olcay Evliyaoğlu. Is Waist-height Ratio Associated with Thyroid Antibody Levels in Children with Obesity?. J Clin Res Pediatr Endocrinol. 2021; 13(2): 152-159
Manuscript Language: English
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