Abstract

Association between eating behavior, biochemical measurements, and pyy hormone levels in obese adolescents

Studying the different dimensions of eating behavior during lifestyle interventions can serve as a tool to identify causes of obesity and track treatment strategies for obese people.

Objective: To evaluate the eating behavior of obese adolescents and its association with biochemical, anthropometric and PYY measures.

Methods: 51 obese adolescents received counseling for weight management at 12 monthly appointments. Fasting serum PYY levels, total cholesterol (TC), high density lipoprotein cholesterol (HDL-C), triglycerides (TG), low density lipoprotein cholesterol (LDL-C), insulin and glucose levels, waist circumference (WC) and results from the Three-Factor Eating Questionnaire (TFEQ-21) were assessed.

Results: Over one year there was a significant increase in PYY levels (p = 0.026); reduction in TC (p = 0.003), TG (p = 0.022), BMI (p = 0.002), BMI z-score (p <0.001) and WC (p = 0.003). There was a decrease in the Uncontrolled Eating score (UE), illustrating that adolescents displayed more self-control (p = 0.008) at the end of the study. The reduction in UE was associated with a significant improvement in insulin levels (rs = 0.326; p = 0.020). The reduction in UE was also associated with lower levels of blood glucose (r = 0.332; p = 0.017), and the increase of cognitive restriction, with the reduction of insulin insulin (rs = -0.294 p = 0.036) and TG (r = -0.368; p = 0.008).

Conclusions: Our results show that after a year of monitoring weight loss, adolescents had more controlled eating behaviors, increased PYY levels, and reduced weights.


Author(s): Janine Alessi1 , Simone Pereira Fernandes1,2, ,2, Zilda Elisabeth Albuquerque Santos1,2 , Elza Daniel de Mello1

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