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Imitating friends: Do classmates influence alcohol and tobacco consumption?

Writer's picture: Dr Catia NicodemoDr Catia Nicodemo

In the rollercoaster ride of adolescence, teens navigate a world of challenges, choices, and influences. Among the most powerful forces shaping their decisions are their peers, especially when it comes to risky behaviors like alcohol and tobacco use. A new study dives deep into this issue, offering fresh insights that could reshape our understanding of teen substance use and guide future prevention efforts (link to the study).


Let's start by painting a picture of teen substance use in Spain, where the study took place. Among teens aged 14-18, about 60% reported drinking alcohol in the past month, while 20% used tobacco. More concerning still, 13% admitted to drinking every weekend, and 7% smoked daily. These numbers underscore the urgent need for effective interventions to curb substance use among young people. So, what did the researchers discover about the power of peer influence? When it comes to alcohol, the effect is significant. A mere 10% increase in classmates' alcohol use led to a 4.7 percentage point jump in the likelihood of an individual student drinking. To put that in perspective, it could potentially raise the overall alcohol consumption rate from 60% to 68% - a substantial increase that should give parents and educators pause.


The influence of peers becomes even more pronounced when we look at more intensive alcohol use, such as drinking every weekend. In these cases, the peer effect rose to 6.2 percentage points. This suggests that peer pressure might be particularly potent in social situations like weekend parties, where the temptation to conform to group behavior is strong.


Interestingly, the study found a different story when it came to tobacco use. Unlike alcohol, the smoking rate in a class didn't seem to significantly influence an individual student's decision to light up. This contrast between alcohol and tobacco use highlights the complex nature of peer influence and suggests that prevention strategies may need to be tailored differently for each substance.


The research also uncovered an unexpected factor that intensifies peer influence on alcohol consumption: repeat students. In classes with a higher proportion of students who have been held back a grade, the peer effect on alcohol use grew stronger. For classes where over 40% of students were repeaters, the peer influence on drinking surged to 7.5 percentage points. This finding is particularly relevant for Spain, which has one of the highest rates of grade repetition among OECD countries at 31%. It suggests that high numbers of repeat students in a class may contribute to increased alcohol use among their peers, adding another layer of complexity to the issue.


The type of school also played a role in peer influence dynamics. Both alcohol and tobacco use showed a stronger peer effect in subsidized private schools compared to public schools. While the reasons behind this difference aren't clear from the available data, it suggests that prevention efforts might need to be tailored to specific school environments.


Understanding these dynamics of peer influence is crucial for several reasons. It allows us to design more targeted and effective prevention programs. It informs educational policies, considering both academic and social impacts of practices like grade repetition. It raises awareness among parents and educators about the importance of peer group dynamics. And it underscores the need for differentiated approaches to alcohol and tobacco prevention.


So, what does all this mean for parents, educators, and policymakers? While the study focused on Spain, its findings offer valuable insights that can be applied more broadly. Given the strong peer effect on alcohol use, especially weekend drinking, targeted interventions in this area could be particularly effective. Schools and policymakers might want to re-evaluate policies on grade repetition and class grouping, considering their potential impact on substance use.


There's also an opportunity to leverage positive peer influence. While this study highlights negative peer effects, the same dynamic could potentially be used to promote healthy behaviors among teens. The lack of peer effect for tobacco use suggests that different strategies may be needed to address smoking compared to drinking. And the differences observed between public and private schools indicate that prevention efforts might need to be tailored to specific school environments.


Remember, while peer influence is powerful, it's just one piece of the puzzle. A comprehensive approach that includes education, supportive family environments, and community-wide efforts remains crucial in helping teens navigate the challenges of adolescence and make informed choices about their health and well-being. By understanding the intricate dance of peer pressure and individual choice, we can better equip our young people to step confidently into adulthood, armed with the knowledge and support they need to make healthy decisions.


 

Dr Catia Nicodemo


Dr Catia Nicodemo is a health economist and Associate Professor at the University of Oxford's Nuffield Department of Primary Care Health Sciences, Medical Division,  and Professor at the University of Brunel London, Business Economics. Dr Nicodemo's research focuses on health policy, healthcare management, labour economics, and applied econometrics. She has published extensively on topics including immigration and healthcare, mental health, hospital admissions, and health inequalities.

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