We already know that teen dating violence is an issue, but according to a recent report, it turns deadly more often than we think — particularly for girls.

A new report published in JAMA Pediatrics found that 90% of teen victims of intimate-partner homicides in this study were girls killed by a partner who was jealous or angry about a breakup or unrequited affection. Researchers looked at 2,188 homicides of people between ages 11-18 over a 13-year period in which there was a known relationship between the victim and perpetrator. Of those deaths, 150 were classified as intimate-partner homicides. Lead author Avanti Adhia, a senior fellow at the Harborview Injury Prevention and Research Center at the University of Washington School of Medicine, said in a statement that this shows that while intimate-partner homicides aren't very common among teens, it happens more often than people realize and needs to be taken seriously.

“Partly why I was interested in this topic is the perception that teen dating violence is less serious than intimate-partner violence among adults,” Adhia said. “It’s important to understand that things can escalate among teens, as well.”

Researchers found that the majority of teen intimate-partner homicides in this study were committed using a gun, and happened because the victim ended a relationship with the perpetrator, or the perpetrator was jealous of a new relationship the victim was in. Other common scenarios in the study, Adhia said, were fights escalating into deadly gun violence or stabbing.

According to Love Is Respect, a project from the National Domestic Violence Hotline, a 2008 study showed one in three teens in the U.S. is a victim of some kind of abuse from a dating partner. And a 2006 study projected that more than 1.5 million teens will experience physical violence from a partner. Experiencing abuse from a partner when someone is young can lead to further problems down the road, according to Love Is Respect, like eating disorders, substance use disorder, and more domestic violence. Also, there seems to be a link between teen dating violence and gun violence, and mass shooters tend to have a history of abusing women. We've seen specific examples of this play out in recent years, such as a teen at Great Mills High School in Maryland who shot two students at the school, including ex-girlfriend Jaelyn Willey, who died from her injuries two days after the shooting.

Ultimately, this recent report suggests paving the way for teens to be able to get civil and criminal protection orders from the court, and other legal options that could help protect them.

If you or someone you know is in an abusive relationship, you can call the Love Is Respect hotline at 1-866-331-9474, the National Domestic Violence hotline at 1-800-799-7233, or text 'loveis' to 22522. The One Love Foundation also provides additional resources, information, and support.