Schoolyard bullies and their victims face higher risks of anxiety, depression, other psychological disorders later in life http://bit.ly/3Yr4rB
6% of boys in Finland routinely bullied other kids, while 3% were both bullies and victims.
Less than 1% of girls were either bullies or "bully-victims."
30% of boys who had been both bullies and victims ended up taking a psychiatric medication, 17% were admitted to a hospital.
Among girls, 32% of those who had been bullied were eventually prescribed a psychiatric medication (16% if not bullied).
DNA of children who experienced violence and bullying shows wear and tear that is associated with rapid aging http://goo.gl/FzY2i
Image source: Bullying. Wikipedia, GNU Free Documentation License.