Table 1.

Risk and protective factors for bullying in multiple levels.

	Risk factors	Protective factors
Individual	Poor self-concept	High self-esteem
	Physical disabilities	High social skills levels
	Poor social skills
	Early aggressiveness
Family	Authoritarian discipline	Quality communication with parents
	Lack of parental supervision	Parental involvement in school life
	Incidents of domestic violence
School	Overcrowded schools	Orientation toward learning
	Conflictual school climate	Positive peer role-models
	Violent-tolerant peers
Neighborhood	Safety concerns	Promotion of sports and recreational facilities