Gender differences in childhood bmi z-score, alimentary behaviour and lifestyle in a sample of 9-11 children

Child overweight and obesity prevalence has risen substantially in most high-income countries. The prevention of childhood overweight and obesity is a major public health issue. Childhood obesity leads to an increased risk of both physical and mental health consequences,. The aim of this study was to investigate the gender differences in BMI z-score, eating habits, life style and healthy behaviors in children.

With an approach so-called "cluster" method we selected third classes of primary schools. The study was conducted from September 2016 and May 2017 during a school year. Information was collected through a questionnaire filled in by the children with the help of their parents. The biometric data relating to height in meters and weight in kilograms was obtained through the questionnaire.

A total of 1122 children were included in the current study. 33.9% of boys being overweight compared with 27.8% of girls and 19.1% of boys being obese compared with 12.5% of girls (p<0.001). There were significant differences between boys and girls for physical activity (p=0.004), sedentary behaviors (p<0.001), eating habits (p=0.004).

In this study, gender differences were analyzed with respect to BMI z-score, eating habits, life style and healthy behaviors in children between 9 and 11 years old. The results of the study confirm the differences that the scientific literature described. Between boys and girls there are different habits that on the one hand can determine differences in the quality of life and future health and on the other hand can be the key to implementing effective and targeted prevention interventions.