Of the boys who had never bullied others in school, 13.4 percent carried a weapon in the past month, 7.9 percent carried a weapon in school, 8.3 percent were involved in frequent fighting, and 16.2 percent had been injured in a fight. Among the boys who had never been bullied in school, 18.7 percent carried a weapon in the last month, 12.2 percent carried a weapon in school, 12.4 percent were involved in frequent fighting, and 18.3 percent were injured in a fight.
Boys who bullied others when they were away from school were at the greatest risk for engaging in violence-related behaviors. Among the boys who had bullied others once a week while away from school, 70.2 percent had carried a weapon, 58.1 percent reported carrying a weapon in school, 44.8 percent said they fought frequently, and 56.1 percent had been injured in a fight.
Among the boys who had never bullied others away from school, 14.3 percent had carried a weapon in the past month, 8.4 percent had carried a weapon in school, 8.8 percent were involved in frequent fighting, and 16.6 percent had been injured in a fight. Of the boys who had never been bullied away from school, 16.9 percent had carried a weapon in the past month, 10.6 percent carried a weapon in school, 11.2 percent were involved in frequent fighting, and 17.9 percent had been injured in a fight.
The researchers wrote that bullying occurring away from school grounds may be more severe than bullying at school, where there is adult supervision and more protection against violence.
Findings from this study suggest that programs designed to reduce violent behaviors should address less severe forms of aggressive behavior, particularly bullying, the study authors wrote. Bullying, as a behavior that is inflicted with the desire to harm another, seems to be an important marker for violence-related behaviors.
The authors believe their study is the first to examine how bullying relates to other forms of violence. Previous studies, Dr. Nansel explained, have included youth from a small geographic area and looked only at how bullying relates to a single violence-related behavior.
In 2001, Dr. Nansel and colleagues at NICHD and HRSA conducted a survey that determined the extent of bullying in U.S. Schools. A release describing this earlier study has been posted [link=http://parentingteens.about.com/cs/bullying/a/bullying.htm]here.
Dr. Nansel said earlier studies have concluded that the effects of bullying behavior carry into adulthood. People who were bullied as children are more likely to suffer from depression and low self esteem as adults, and the people who bullied others when they were children are more likely to engage in criminal behavior later in life.
In this study, a strong and consistent relationship between bullying and violent behaviors was observed, the authors wrote. This suggests that bullying is likely to occur concurrently with more serious aggressive behavior, and while prevalent, should not be considered a normative aspect of youth development.

