Obez Çocuk ve Adölesanlarda Tiroid Fonksiyonlarının Değerlendirilmesi.

Background: The aim of this study was to evaluate the relationship between thyroid functions and metabolic and anthropometric parameters in obese children and adolescents. Methods: The study included 147 patients diagnosed with exogenous obesity in the pediatric endocrinology outpatient clinic and 46 healthy subjects with similar age and sex. Obese patients were divided into two groups as Group 1 (non-fatty liver) and Group 2 (with fatty liver). Fasting glucose, insulin, total cholesterol, triglyceride, aspartate aminotransferase, alanine aminotransferase, thyroid stimulating hormone (TSH), free triiodothyronine (fT3) and free thyroxine (fT4) samples were performed from all cases in patient groups and control group (Group 3). Insulin resistance was assessed by HOMA-IR (Homeostatic Model Assessment of Insulin Resistance). Results: In Group 2, waist circumference (WC), body mass index-standard deviation scores (SDS), hip circumference (HC), WC/HC ratio and triglyceride, fasting insulin and HOMA-IR values were significantly higher than Group 1 and Group 3 while high density lipoprotein cholesterol level was lower. In Group 1 and Group 2, fT4 level was significantly lower than Group 3, whereas fT3 /fT4 ratio was higher. The mean TSH level was higher in Group 2 than Group 3. fT3 / fT4 ratio; WC, WC / HC ratio was positively correlated with fasting insulin and HOMA-IR. Conclusion: We found that fT4 level was low and fT3 / fT4 ratio was higher in obese children. Considering the high fT3 / fT4 ratio in obese children, this ratio should be stimulating for the clinician regarding the complications associated with visceral adipose tissue as it is positively correlated with WC and insulin resistance. [ABSTRACT FROM AUTHOR]