In a new study published in BMC Psychiatry, researchers have uncovered a concerning link between sleep duration and suicidal thoughts among American teenagers. The study, which analyzed data from over a hundred thousand adolescents, reveals that inadequate sleep may significantly increase the risk of experiencing suicidal ideation and behavior among young people.
Teenage years can be tumultuous, marked by changes in hormones, social pressures, and academic demands. Amidst these challenges, mental health concerns have been on the rise, with a growing number of adolescents experiencing thoughts of suicide. Scientists have long been searching for potential risk factors and triggers to better understand and address this alarming trend.
One factor that has garnered attention is sleep health. Adequate sleep is vital for overall well-being, particularly during adolescence when bodies and minds are still developing. Previous research has linked poor sleep to various adverse health issues, including depression, substance use, and obesity. However, until now, the relationship between sleep duration and suicidal thoughts among different racial and ethnic groups of adolescents has remained largely unexplored.
Prior studies had already documented disparities in sleep sufficiency and length among different racial groups. The new study sought to understand whether sleep could be a significant risk factor for suicidal behaviors and whether this relationship varied across racial and ethnic groups.
“Suicide rates are increasing among adolescents with particularly rapid increases in recent years among minoritized groups. Furthermore, most U.S. adolescents do not achieve the recommended amount of nightly sleep. Thus, understanding sleep as a risk factor for suicidal behaviors among adolescents is essential to identify potential sources of prevention and intervention,” said study author Victoria A. Joseph of Columbia University Mailman School of Public Health.
The research utilized data from the Youth Risk Behavior Surveillance System (YRBSS), a series of surveys conducted in U.S. high schools every two years. The YRBSS surveys include representative samples of high school students, providing valuable insights into adolescent health. For this study, data collected from 2007 to 2019, involving 103,525 adolescents, were analyzed.
The study measured four critical outcome variables related to suicide: suicide attempt, suicidal ideation (thoughts/fantasies), suicide plan, and injurious suicide attempt. Adolescents’ sleep duration was categorized into two groups: those with less than 8 hours of sleep per night (short sleep) and those with 8 or more hours of sleep (long sleep), in accordance with sleep health recommendations.
To account for potential influencing factors, the researchers considered covariates such as race/ethnicity, sexual identity, age, sex, substance use, bullying experiences, and sexual trauma.
The researchers found that, across all racial groups, suicide ideation and behavior increased from 2007 to 2019. Particularly striking was the sharp increase in suicide attempts among Black adolescents between 2015 and 2019.
After adjusting for various covariates, the researchers observed a substantial association between short sleep duration and suicidal ideation/behavior. Adolescents with less than 8 hours of sleep had nearly twice the odds of experiencing suicidal ideation, suicide attempts, plans, or injurious suicide attempts compared to those with 8 or more hours of sleep.
Joseph and her colleagues identified significant interactions between sleep duration and race/ethnicity in predicting suicide outcomes. While short sleep was associated with increased risk for all racial groups, the magnitude of this association varied. Black and Hispanic adolescents showed a relatively smaller but still significant association between short sleep and suicidal ideation/behavior compared to other racial/ethnic groups.
However, the researchers said that the smaller association between sleep and suicidality among Black and Hispanic students might be due to underreporting of mental health outcomes among these minority populations. This underreporting could potentially lead to an underestimation of the relationship between sleep and suicidal behavior in these groups.
“This study highlights the relationship between short sleep and suicide risk among U.S. youth,” Joseph told PsyPost. “Thus, efforts should be made to ensure that adolescents achieve the recommended 7-9 hours of nightly sleep. Moreover, additional research is needed to assess factors that predict suicidal behaviors among minoritized adolescents.”
While this study provides valuable insights, it is not without limitations. The researchers acknowledge that the data is based on surveys, which may be subject to responder bias. Additionally, the study does not account for family socioeconomic status, an important variable associated with sleep and suicide.
Future research is needed to assess longer-term trends in the impact of sleep duration on suicide risk, as well as to explore race-specific predictors of suicide among U.S. adolescents. The development of culturally competent sleep interventions for minoritized adolescents and the identification of additional predictors of suicide risk among these groups could also be a focus of future investigations.
The study, “Sleep deprivation and suicide risk among minoritized US adolescents“, was authored by Victoria A. Joseph, Noah T. Kreski, and Katherine M. Keyes.