The number of kids who struggle with thoughts of suicide – or attempt to kill themselves – is rising. New research, published Wednesday in Pediatrics finds children ages 5-17 visited children’s hospitals for suicidal thoughts or attempts about twice as often in 2015 as in 2008.

The study found kids of all ages are affected though increases were greatest for older adolescents.

Lead author Gregory Plemmons, a pediatrician and researcher at Vanderbilt University in Nashville, Tenn., says the study results confirmed what he’d been seeing at the hospital.

He says he hopes clinicians and families take note. “The number one thing to take home is that it’s important to talk about this and important to ask about it,” he says.

The findings line up with past data showing a steady increase in teen suicide over the past decade. The Centers for Disease Control and Prevention reported last year that a drop in adolescent suicide in the 1990s and early 2000s reversed course in 2008, though it’s not yet reached peak levels seen in the 1980s. It’s not clear what has contributed to the increase, but the study noted the 2008 financial crisis may be one factor among others.

Plemmons and his co-researchers examined 2008-2015 billing data from a database of 49 children’s hospitals across the U.S. They included all emergency department encounters, stays for observation and inpatient hospitalizations at those hospitals, but did not include community hospitals.

The researchers turned up 115,856 visits for suicidal ideation or attempts, during the seven-year period. Such visits represented 0.7 percent of total children’s hospital visits in 2008 but by 2015 had increased to 1.8 percent of all visits. More than half the visits required at least one night of hospitalization, and nearly 1 in 7 required intensive care.

Older teens were more likely to end up in the hospital and had the greater increase in hospital visits. About half of suicide-related hospital visits for the time studied were from teens ages 15-17, but 12- to 14-year-olds closely trailed them, making up 37 percent of visits. Children ages 5-11 made up the remaining 13 percent.

One of the study’s most striking findings was a seasonal trend in hospital visits. Throughout the years, visits peaked in mid-fall and mid-spring and fell to the lowest point in the summer. “We knew there was an association with school seasons, but actually seeing that mapped out was surprising,” says Plemmons. It suggests a link with school pressures.

“It really speaks to the stress and the strain at school,” says Dr. Robert Dicker, associate director of Child & Adolescent Psychiatry at Zucker Hillside Hospital in Glen Oaks, New York. “Kids appear to be under much more academic success to achieve and their perception of falling short.”

Dicker, who was not involved in the study, also noted possible influences from the media, particularly social media.

Plemmons also drew attention to social media’s influence. “You’re becoming more disconnected and not having relationships with real people, and at the same time you’re being fed a false distortion of what reality is, where everything looks great on screen,” he says.

Cyberbullying and sexting he adds, could also be risk factors. “These kids have to deal with pressures that we didn’t deal with.”

Other possible contributors noted in the study included earlier puberty in girls, since reaching puberty is a risk factor for suicide. Girls made up two-thirds of the hospital visits in the study period.

But none of these possibilities is definitive.

“This type of study is very good at revealing trends but cannot address causality,” says Dr. Laurel Williams, chief of psychiatry at Texas Children’s Hospital in Houston, Texas. Despite being the third leading cause of death in adolescents, suicide is still relatively rare, making it harder to study causes, she says.

But it is important to screen for depression and anxiety, she says. Her institution also uses validated screening tools to screen adolescents and is exploring tele-consultation strategies to help pediatricians manage cases if they feel underprepared or uncomfortable.

“We know there are a lot of patients still out there who have clinical depression who are not accessing care,” Plemmons says, adding that it’s important for adults to identify resources in their area for struggling teens. Parents can start with their child’s primary care doctor.

But the most important first step is one anyone can take.

“The current best method for identifying risk is to ask,” Williams says. “Asking a young person how they are feeling, not just how they are doing, is essential. We need to give young people the time and space to talk about how they are feeling. This involves developing closer relationships over time, not something you can scramble at the last minute or only in moments of crisis.”

Plemmons also emphasized the importance of talking to adolescents about the issue.

“There’s still a huge stigma and anything you can do to destigmatize it helps,” he says, adding that a fear still exists among some pediatricians and parents that discussing suicide may suggest it to adolescents.

“We know from literature that that’s not the case,” Plemmons says. “Talking about it can sometimes help reduce the risk.”

If you or someone you know may be considering suicide, contact the National Suicide Prevention Lifeline at 1-800-273-8255 (En Español: 1-888-628-9454; Deaf and Hard of Hearing: 1-800-799-4889) or the Crisis Text Line by texting 741741.

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