Adequate sleep is vital for the health and development of children, yet their sleep habits during childhood may have implications for their propensity towards substance use in the future. A recent study spearheaded by a group of researchers at Penn State indicates that adolescents who experienced shorter sleep durations and later bedtimes during their childhood were more likely to consume alcohol or experiment with marijuana by the age of 15. These findings were published in the Annals of Epidemiology. Anne-Marie Chang, an associate professor of biobehavioral health at Penn State and the study’s senior author, mentioned that the research pinpoints certain ages where sleep could be effectively targeted to prevent adverse outcomes. By enhancing sleep among school-aged children, improvements could be seen not only in sleep health but also in critical areas such as decision-making, potentially reducing engagement in risky behaviours such as alcohol and drug use.
The study delved into children’s sleep patterns at various developmental stages, exploring how these patterns affect later substance use—a relatively unexplored focus in existing research. The researchers concentrated on two main aspects of sleep: the total duration and specific sleep timings. They noted that later bedtimes could impair sleep quality, particularly in school-aged children. “Sleep is complex and plays a crucial role in children’s growth and cognitive development. Younger brains, which are more malleable, particularly benefit from quality sleep, which supports healthy neurological development,” explained David Reichenberger, co-lead author of the study and a recent doctoral graduate from Penn State. He further highlighted that poor sleep could lead to negative impacts on physical health and decision-making capabilities, which could subsequently influence substance use behaviours.
The research utilized data from 1,514 Future of Families and Child Wellbeing Study participants, a diverse longitudinal cohort from 20 cities across the United States. This data included parents’ reports of their children’s regular bedtime and sleep duration at ages three, five, and nine. Their analysis found a significant longitudinal relationship between sleep patterns in childhood and subsequent alcohol and marijuana use during adolescence. For instance, a later bedtime at age nine was associated with a 45% increased likelihood of trying alcohol by age 15 compared to those with earlier bedtimes. Conversely, the bedtime at age five showed no correlation with future alcohol use, nor did sleep duration at ages five or nine influence this outcome. Regarding marijuana, a later bedtime at age five increased the odds of trying marijuana by age 15 by 26%, and each hour less of sleep at age nine raised the odds by 19%.
Further assessments at age 15, where adolescents reported their own sleep habits and substance use, echoed these findings. Teens with later bedtimes were 39% more likely to drink alcohol and 34% more likely to try marijuana. Additionally, each hour of reduced sleep was linked with a 28% higher likelihood of having tried alcohol, although it did not correlate with marijuana use. Reichenberger emphasized that sleep patterns closer to adolescence are particularly critical for mitigating future substance use risks. The developmental changes and brain maturation occurring during this period make it a crucial time for ensuring adequate sleep, as prior research indicates that insufficient sleep can heighten impulsivity and compromise decision-making abilities, influencing the likelihood of substance use.
The study underscores the importance of sleep for various facets of long-term health and well-being. For school-aged children, fostering an environment conducive to good sleep and establishing appropriate bedtimes are essential for promoting healthy sleep habits. “Exploring the link between sleep and substance use remains a pivotal area of study, especially as we continue to confront widespread issues such as opioid addiction and substance abuse,” Chang concluded. This ongoing research is crucial for informing public health strategies and enhancing the understanding of healthcare professionals and families about the broader impacts of sleep on health and behaviour.
More information: Akshay S. Krishnan et al, Childhood sleep is prospectively associated with adolescent alcohol and marijuana use, Annals of Epidemiology. DOI: 10.1016/j.annepidem.2024.07.048
Journal information: Annals of Epidemiology Provided by Penn State
