Nearly 1 in 4 teen girls in the US self-harm, massive high school survey finds

A new study published Wednesday finds that more kids are either thinking about or attempting suicide. For the study, a database of visits at 49 children’s hospitals for kids aged 5 to 17 were analyzed. Researchers found that over the past decade "the rates doubled among children that were hospitalized for suicidal thoughts or activity." Half of the encounters involved teens aged 15 to 17; 37 percent were 12 to 14; and almost 13 percent were children aged 5 to 11 years.

Self-harm or self-injury, the act of hurting oneself on purpose, affects nearly 1 in 4 teenage girls in the United States.

» RELATED: Why more US teens are suffering from severe anxiety than ever before — and how parents can help

That's according to a new study recently published in the American Journal of Public Health, for which researchers at the University of Portland in Oregon assessed the prevalence of non-suicidal self-injury among adolescents through the 2015 Centers for Disease Control and Prevention Youth Risk Behavior Surveillance System.

The YRBSS featured information on 64,671 public high school students ages 14-18 from 11 states via ongoing school-based national, state, tribal and large urban school district surveys representative of high school students in America, plus one-time national and special-population surveys.

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Participants in the 11 states — Arizona, Connecticut, Delaware, Florida, Idaho, Kentucky, Massachusetts, Nevada, New Hampshire, New Mexico and Vermont — answered at least 89 questions about demographics; unintentional injuries and violence; tobacco use; alcohol and drug use; sexual behaviors; body weight and diet behaviors; physical activity and other health-related topics.

A sample question addressing NSSI may read: “During the past 12 months, how many times did you do something to purposely hurt yourself without wanting to die, such as cutting or burning yourself on purpose?” with choice options of “0 times,” “1 time,” “2 or 3 times,” “4 or 5 times” and “6 or more times.”

Questionnaires were administered and collected during a single class period, according to the study.

What exactly is self-harm?

"Self-harm or self-injury means hurting yourself on purpose," according to the National Alliance on Mental Illness. "One common method is cutting yourself with a knife. But any time someone deliberately hurts herself is classified as self-harm. Some people feel an impulse to burn themselves, pull out hair or pick at wounds to prevent healing. Extreme injuries can result in broken bones."

It isn’t a mental illness, “but a behavior that indicates a lack of coping skills” that may be associated with illnesses such as borderline personality disorder, depression, eating disorders, anxiety or posttraumatic distress disorder.

» RELATED: The suicide rate for teen girls is the highest it's been in 40 years — Is social media to blame?

Key Findings

Overall, 17.6 percent of survey respondents in the University of Portland study reported at least one NSSI act in the previous year.

"The numbers are very disturbing," study co-author Nick McRee told BuzzFeed News. "They suggest that the behavior is not concentrated among a small number of disturbed youths, but in fact, it is a fairly common type of behavior among adolescents in general."

» RELATED: What's killing America's teens? Inside CDC's new mortality report

The rate of boys reporting self-harm without wanting to die over the past year ranged between 6.4 percent to 14.8 percent. The rate for girls was twice as high.

In fact, in some states, such as Idaho, the rate of self-harm for teenage girls was as high as 31 percent.

» RELATED: Self-inflicted injuries on the rise among middle school girls, study says

They were also more likely than boys to report experiencing most of the health risks believed to be associated with NSSI, authors wrote. Such health risks include depression, suicidal thoughts, forced sex and cyber bullying.

Still, more than 1 in 10 high school boys in the analyses reported NSSI.

Across the board, prevalence of NSSI appeared to decline with age. Among 14-year-olds, 19.4 percent reported at least one incident of NSSI. Among 18-year-olds, the rate dropped to 14.7 percent.

» RELATED: CDC: Suicide rate up 16 percent in Georgia

“No particular racial or ethnic group is immune from NSSI, though rates were higher among Native Americans, Hispanics, and Whites than they were among Asians and Blacks,” authors wrote.

In fact, more than 20 percent of adolescents identifying as Native American reported NSSI, compared to just over 12 percent of African-American youth.

“Our findings indicate that the scope of NSSI among adolescents is so widespread that individual clinical and therapeutic interventions may be insufficient to address this public health problem,” report authors wrote.

The researchers hope school-based and community health programs will better address the identified risk factors. Additionally, they wrote, because many factors associated with NSSI can also be linked to other mental health problems, “efforts to prevent NSSI should be incorporated into broader efforts to address mental health among children and adolescents.”

» RELATED: All teens need to be screened for depression, American pediatricians urge

Study Limitations

Some limitations the scientists addressed include lack of insights about the severity of injuries or how participants felt about their behavior, suggesting the evidence lacks in-depth analyses common in clinical samples.

Questionnaires also didn’t include questions about other factors associated with NSSI, such as family dynamics.

Future research should focus on whether the high rates of NSSI reflect a trend or just evidence of public recognition of the phenomenon, authors wrote. Additionally, researchers believe more investigation is needed to understand whether the observed NSSI decline by age continues beyond high school or has lasting effects.

Read the full study at

If you or anyone you know is self-harming, depressed, contemplating suicide, or if you are concerned for someone else, here are some helpful resources: 

National Suicide Prevention Lifeline (24 hours): 1-800-273-8255

Text TALK to 741741 for anonymous and free counseling (24 hours)

RAINN sexual assault hotline: 1-800-656-4673

SAMHSA, confidential support for substance abuse help: 1-800-662-4357

Trevor Lifeline, suicide hotline for LGBT youth: 1-866-488-7386

Online chat

Suicide prevention resources for parents, guardians and families

Suicide prevention resources for teens

Suicide prevention resources for survivors of suicide loss

More resources and programs at the Suicide Prevention Resource Center.