Study: Suicidal Ideation Among US Teens Began Rising Sharply After Nearly Two Decades of Decline

Researchers have identified a stark turning point in the mental health indicators of American teenagers around 2009–2010, Medical Xpress reports.

Following nearly two decades of decline, the prevalence of suicidal thoughts, suicide attempts, and the proportion of teens experiencing persistent feelings of sadness or hopelessness began to climb. These findings were presented at the American Academy of Pediatrics National Conference in San Diego.

The researchers analyzed data from the national Youth Risk Behavior Surveillance System (YRBSS) spanning 1991 to 2021, covering US high school students in grades 9 through 12. Using statistical modeling, they sought to identify critical joinpoints where long-term trend directions shifted significantly.

The number of adolescents reporting suicidal ideation dropped substantially between 1991 and 2009, but began rising after 2009 at a rate of approximately 3.7% annually. Suicide attempts similarly surged post-2009. The rate of persistent sadness or hopelessness also initiated an upward trend in 2009, with the pace of growth accelerating markedly after 2017.

Concurrently, the researchers documented declines across other well-being metrics. Sleep deprivation began increasing after 2013, while obesity rates started climbing after 2011. Academic performance, measured by self-reported school grades, showed a steady downward slope from 2001 through 2019.

The study's authors emphasize the simultaneous nature of these shifts across multiple domains. In their view, this concurrency points toward broader societal and environmental systemic shifts rather than isolated issues.

Potential contributing factors cited by the researchers include the rapid adoption of digital technologies and social media platforms, the lingering aftermath of the 2008 economic crisis, evolving academic workloads, and changes in healthcare access. However, the study design cannot establish direct cause-and-effect relationships between these variables and the decline in youth mental health metrics.

"The most surprising finding was not just that mental health worsened, but that all these trends shifted around the exact same time," said lead study author Niyati Sharma, a high school senior from New York.

According to the research team, pinpointing the precise inflection point could assist future investigations into the root causes of the youth mental health crisis and inform more targeted prevention efforts.

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