Concentraciones plasmáticas de TSH y tiroxina e índice de masa corporal en niños y adolescentes eutiroideos con sobrepeso u obesidad / Association between serum thyroid hormones and body mass index in overweight and obese children

ABSTRACT

Background: There is a possible association between mild thyroid dysfunction and changes in body mass index (BMI) and lean body mass. Aim: To study the association between TSH and free thyroxin levels and BMI among euthyroid children with overweight or obesity. Material and methods: Prospective study of 49 patients (39 males) aged 7 to 16 years, consulting for overweight or obesity. Serum TSH and free thyroxine levels were measured and the BMI z score was calculated. The correlation between thyroid hormone levels and BMI was calculated. Also serum hormones were divided in terciles to look for differences in BMI. Results: No significant association was found between serum TSH and free thyroxin levels and BMI. Conclusions: In this series of pediatric patients, no association between serum thyroid hormones and BMI, was observed.