Prevalence and factors associated with bullying phenomenon among pre-adolescents attending first-grade secondary schools of Palermo, Italy, and a comparative systematic literature review.

The prevalence of the bullying phenomenon recorded by this survey with the three different methods used is similar to observations in international literature. In the Sicilian context, a higher prevalence of bullying phenomena was observed in pre-adolescents attending major classes and in schools with lower socio-economic index. Though it remains difficult to obtain univocal data that clarifies the prevalence of different type of bullying, the continuous investigation of prevalence and factors associated with the phenomenon is a necessary starting point to introduce interventions and preventive measures in Public Health programs.