Associations between the practice of bullying and individual and contextual variables from the

Objectives: To estimate the prevalence of bullying among Brazilian students from the aggressor’s perspective and to analyze its association with individual and contextual variables. Methods: This was a cross-sectional population-based study carried out with data from the National Survey on Student Health. A total of 109,104 students attending eight grade in public and private schools were included. Data were collected through a self-applied questionnaire. A model of association between bullying and variables in the following domains was tested: sociodemographics, risk behaviors, mental health, and family context. Univariate and multivariate analyses were also performed. Results: The prevalence of aggressors in bullying situations was 20.8%. The following variables remained associated in the “nal multivariate model: male gender (OR: 1.87; 95% CI: 1.79---1.94), lower participation of 16-year-old students (OR: 0.66; 95% CI: 0.53---0.82), and students from private schools (OR: 1.33; 95% CI: 1.27---1.39). Most aggressors reported feeling lonely (OR: 1.22; 95% CI: 1.16---1.28), insomnia episodes (OR: 1.21; 95% CI: 1.14---1.29), and a high prevalence of physical violence in the family (OR: 1.97 95% CI: 1.87---2.08). Aggressors missed classes more frequently (OR: 1.45; 95% CI: 1.40---1.51), and they regularly consumed more tobacco (OR: 1.21;