The risk of experiencing or perpetrate violence in teenage relationships is high: around 20 percent for physical violence and around 9 percent for sexual violence. A research team of health psychologists has now conducted a systematic review study to determine the extent to which these experiences have a long-term impact. The results show: Adolescents who experience or perpetrate teen dating violence (TDV) are more likely to report the same in adulthood. In addition, long-term evidence shows that youth reporting dating violence are more likely to later engage in increased risk behaviours (for example, alcohol and marijuana use) and poor mental health.