The influence of puberty onset, body mass index, and pressure to be thin on disordered eating behaviors in children and adolescents.

The main objective of this study is to verify the hypothesis that pubertal development, obesity, body satisfaction, as well as family and peer influences predict unhealthy eating habits in children and adolescents. A randomized stratified sample of young Quebecers aged 9, 13, and 16 years on March 31, 1999 [608 children aged of 9 years (325 girls and 283 boys) and 662 adolescents aged of 13 and 16 years (349 girls and 313 boys)] were used. Children's weight, height, and Body Mass Index (BMI) were recorded. Questionnaires were administered to children and a parent (usually the mother). Among 9-year-old children, this study found that weight loss or weight control behaviors were predicted mainly by the onset of puberty, lower maternal abusive control, and the level of peer pressure. Among adolescents, mother's BMI, income, peer pressure, and negative comments about the child's weight most strongly predicted behaviors to control weight, strategies to lose weight and the frequency of such behaviors. The findings suggest that both parents and children need to understand the impact of comments on a child's behavior.