So-called non-suicidal self-injury has long been more common among
girls than boys, but the current study offers fresh evidence that
the problem is widespread for youth of both sexes.
While the study found a history of suicide attempts and suicidal
thoughts may make self-harm more likely, the results also suggest
that other events like being a victim of rape or cyberbullying can
increase the risk.
Researchers surveyed more than 64,000 male and female high school
students in 11 U.S. states. Almost 18 percent reported at least one
episode of self-injury in the previous year, according to a report
in the American Journal of Public Health.
"Self-injury is surprisingly common among adolescents," study leader
Martin Monto of the University of Portland, Oregon, said by email.
"For teens who are grappling with this issue or parents who are
responding to it, they are not alone."
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Girls were roughly twice as likely as boys to report self-harm.
Girls were also more likely to report risk factors for self-injury
like depression, suicidal thoughts, or being a victim of rape or
cyberbullying.
Teens who reported being forced to have sex at any point in their
lives were 56 percent more likely to report self-injury in the
previous year than youth who hadn't had a nonconsensual sexual
experience, the study found.
Adolescents who reported being bullied online in the past year were
more than twice as likely to report self-injury in the same period
than teens who were not cyberbullying victims, the study also found.
Gay, lesbian and bisexual teens were also more than twice as likely
to report self-injury over the previous year compared to youth who
identified as heterosexual.
And teens who had contemplated suicide were almost three times more
likely to report self-injury than those who didn't consider killing
themselves. Planning a suicide made the risk of self-injury even
higher.
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The study included high school students from Arizona, Connecticut,
Delaware, Florida, Idaho, Kentucky, Massachusetts, Nevada, New
Hampshire, New Mexico and Vermont.
Among boys, rates of intentionally harming themselves without trying
to die ranged from a low of 6.4 percent in Delaware to a high of
14.8 percent in Nevada.
For girls, rates of purposefully harming themselves without
attempting suicide ranged from a low of 17.7 percent in Delaware to
a high of 30.8 percent in Idaho.
The study was not a controlled experiment designed to prove whether
or how specific factors might influence the potential for teens to
report self-harm or the differences between boys and girls. It's
also possible that the results might not reflect trends across the
rest of the country.
It's possible, too, that gender norms in the U.S. and the way the
survey asked about self-harm might explain some of the differences
between boys and girls in the study, said Nicholas Westers,
co-author of an accompanying editorial and a researcher at
Children's Medical Center Dallas and the University of Texas
Southwestern Medical Center.
The survey gave two examples of self-harm - cutting and burning -
and girls may do these things more often than boys, Westers said by
email. Boys may be more likely to do other types of self-injury,
like hitting or punching themselves or getting into fights with the
intention of getting hurt, that aren't always recognized as
self-harm.
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"In short, there really is no one reason for these gender
differences of which we are aware," Westers said. "A lot of research
has not found any gender differences at all."
SOURCE: https://bit.ly/2MIntTb and https://bit.ly/2LQ69Qf American
Journal of Public Health, online July 11, 2018.
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