'When I came to university, that's when the real shift came': alcohol and belonging in English higher education.

While young people's alcohol consumption has fallen sharply in the United Kingdom and other high-income countries, universities remain places where heavy drinking is routine and normative. Drawing on interviews with undergraduate students, this article explores how heavy drinking is part of how students negotiate a sense of belonging and form personal relationships. Theoretical work on belonging and relationality is used to make sense of students' encounters with alcohol. Consistent with the decline in youth drinking, several interviewees had limited experience of heavy drinking prior to university, and some were not interested in taking it up. After describing how heavy drinking facilitates belonging in certain spaces of student life, we examine the strategies of non- and low-drinking students in navigating these spaces. Attending to their strategies suggests that becoming known as 'social persons' is key to negotiating belonging without drinking heavily. We conclude by considering how universities might better accommodate the desire for belonging for the increasingly large proportion of students with limited experience of or desire for alcohol by creating opportunities for students to form personal relationships in ways that do not involve alcohol or where alcohol is peripheral to the activity.

Impact of COVID-19 early in the pandemic on the mental health and wellbeing of adolescents in Australia and Cambodia: a cross-national comparison using a quantitative descriptive and comparative approach.

The impact of COVID-19 on the mental health and wellbeing of adolescents is a major concern. Most research has been conducted only in more economically developed countries. Using data from two similar surveys administered during July-September, 2020 in Australia (a high-income country) and Cambodia (a low-middle income country), this paper examined the impact early in the pandemic on the mental health and wellbeing of adolescents in the two countries. We found that COVID-19 had mostly negative impacts on participants' mental health; threats to personal safety; education; support for schooling; basic necessities such as food, income, employment, and housing; and responsibilities at home. This finding suggests that even short-term disasters may have negative repercussions, and regardless of differences in wealth, culture, and government response. We found that threats to personal safety appeared to be more prevalent in Cambodia than in Australia, the impact on mental health of the Cambodian participants may have been greater than reported, and that, in both countries, support for online or distance schooling during periods of lockdown was wanting, particularly at the state and school levels. This study will contribute to our understanding of the impact of major disruptive global events on young people in both more economically developed and developing countries.

The lived experience of weight loss maintenance in young people.

INTRODUCTION: There continues to be an imbalance of research into weight loss and weight loss maintenance (WLM), with a particular lack of research into WLM in young people under 18 years. Failure to coherently understand WLM in young people may be a potential contributor to the underdeveloped guidance surrounding long-term support. Furthermore, no research has investigated young people's preferences around WLM support following the attendance of a residential intensive weight loss intervention from a qualitative perspective. This study explored the influences of WLM in young people following a residential intensive weight loss intervention, considered how interventions could be improved and sought to develop recommendations for stakeholders responsible for designing WLM interventions. METHODS: The context in which this research is framed was taken from a residential Intensive Weight Loss Intervention for young people aged 8-17 years in England. Six semi-structured interviews were carried out to understand the lived experience of WLM, including barriers and enablers influencing WLM, adopting an interpretative phenomenological analysis design. FINDINGS: Three superordinate themes were developed to explain the barriers and enablers to WLM; (1) Behavioural control and the psychosocial skills to self-regulate WLM; (2) Delivering effective social support; and (3) Conflicting priorities and environmental triggers. CONCLUSION: The findings of this research mirror that of other studies of WLM in young people, with the majority of young people struggling to maintain weight loss. However, by exploring the experience of WLM in young people through qualitative means, it was possible to understand the specific motivators and barriers influencing WLM behaviours in this context, providing recommendations to support WLM. PATIENT OR PUBLIC CONTRIBUTION: The interview guide was developed in consultation with a young person from the intervention, and through discussions with the intervention stakeholders (delivery staff and management staff). The interview guide included topics such as knowledge and skills; experience of weight loss; reflections on weight maintenance, and experiences of daily life postintervention. We piloted the interview schedule with one young person who had consented to take part in the research. This first interview was used to check for understanding of questions and to assess the flow of the interview.

Contextual Variables Associated with Challenging Behaviors in Adolescents with Fragile X Syndrome.

PURPOSE: Our purpose was to report on a novel method of identifying variables associated with challenging behaviors in natural interactions between mothers and their adolescents with Fragile X syndrome (FXS). METHODS: Videotaped interactions of 47 dyads interacting with an iPad game, completing a puzzle, and making a snack and were coded for challenging behaviors by adolescents with FXS, and maternal behaviors that preceded these behaviors. We described the frequencies of adolescent challenging behaviors, then used sequential and survival analyses to identify maternal and adolescent behaviors that preceded self-injurious behavior (SIB) and aggression. RESULTS: Across all the dyads, 109 instances of SIB and 79 instances of aggression were identified during the 30 min of recorded interaction. Most of these challenging behaviors occurred during the iPad activity. The sequential analysis indicated that maternal requests for behavioral compliance frequently preceded both SIB and aggression. Survival analyses revealed that the likelihood of SIB or aggression was increased if the mothers requested behavioral compliance after the child engaged in another challenging behavior. CONCLUSION: Challenging behaviors including SIB and aggression were frequently observed in many participants. The sequential and survival analyses were useful for identifying precursors to these behaviors. Further research is needed to investigate preventative strategies based on the results of sequential and survival analyses.

Development and psychometric assessment of the Sociocultural Influences on Exercise Behaviours in Adolescents Questionnaire.

OBJECTIVES: This research aimed to construct and psychometrically test a measure of multiple sociocultural dimensions (i.e. family, peers, media) theoretically associated with exercise behaviours/attitudes in adolescents; the Sociocultural Influences on Exercise Behaviours in Adolescents Questionnaire (SIEBAQ). METHODS AND MEASUREMENT: Part 1 of this study focused on measure construction and psychometric testing, involving item generation and exploratory factor analysis (EFA) to refine the item pool, with 905 adolescents (Mage 13.66 years (SD = 0.94); girls = 442). Part 2 sought to explore the convergent validity of the SIEBAQ (n = 846; n = 414 girls). RESULTS: EFA resulted in a 47-item measure with a nine-factor structure (including social media modelling, parent exercise expectations, peer co-participation; α = 0.72-0.92). Correlations revealed weak-moderate significant relationships between the SIEBAQ and related constructs (e.g. compulsive exercise, sociocultural attitudes towards appearance). Regression analyses with the SIEBAQ identified social media modelling of exercise as a significant predictor of compulsive exercise in boys and girls. Proving exercise ability to significant others also significantly predicted compulsive exercise outcomes. CONCLUSION: This newly developed measure holds promise. Further psychometric testing and validation of the SIEBAQ is the recommended next step to confirm the measure's nine-factor structure identified through EFA.

Improving healthcare transition for young people with cancer: factors fundamental to the quality improvement journey.

BACKGROUND: Young people receiving cancer treatment in the South Thames Children's, Teenagers' and Young Adults' Cancer Operational Delivery Network usually receive care across two or more NHS trusts, meaning transition into adult services can be challenging. AIM: To develop a planned, co-ordinated approach to transition across the network that meets National Institute for Health and Care Excellence guidance recommendations for transition and the cancer service specifications. METHODS: A 2-year, nurse-led quality improvement (QI) project, using the principles of experience-based co-design. OUTCOMES: The QI project resulted in the development of six key principles of practice; refining and testing of a benchmarking tool; initiatives to facilitate first transition conversations; and the launch of an information hub. CONCLUSION: Robust QI processes, cross-network collaboration and wide stakeholder involvement required significant resource, but enabled deeper understanding of existing pathways and processes, facilitated the establishment of meaningful objectives, and enabled the testing of interventions to ensure the project outcomes met the needs of all stakeholders.

Developing inclusive public involvement and engagement activities with secondary school students and educational professionals: a protocol.

BACKGROUND: Public involvement and engagement (PI&E) is increasingly recognised as an important component of research. It can offer valuable insights from those with experiential knowledge to improve research quality, relevance, and reach. Similarly, schools are ever more common sites for health research and, more recently, PI&E. However, 'gold-standard' practice is yet to be established, and activities/approaches remain underreported. As a result, knowledge can remain localised or lost. Diversity and inclusion also remains a challenge. METHODS: This protocol has been informed by UK national guidance, evidence-based frameworks and available implementation literature. It describes both rationale and approach to conducting PI&E activities within a secondary school context. Activities are designed to be engaging, safe and accessible to young people with diverse experiences, with scope to be iteratively developed in line with public collaborator preference. DISCUSSION: Young people should be architects of their involvement and engagement. Ongoing appraisal and transparency of approaches to PI&E in school settings is crucial. Expected challenges of implementing this protocol include facilitating a safe space for the discussion of sensitive topics, absence and attrition, recruiting students with a diverse range of experiences, and potential knowledge and capacity barriers of both facilitator and contributors. Activities to mitigate these risks are suggested and explored.

Schools are increasingly becoming hubs for health research. However, there is a lack of knowledge about how researchers, schools and students can best work together to shape the studies we do. This is a problem as, in the world of research, involving those with first hand experiences (public collaborators) in the research process is seen as crucial.This protocol outlines our plan for conducting public involvement and engagement activities in secondary schools. It is based on national guidance and existing evidence. The goal is to make these activities interesting, safe, and accessible to young people with diverse experiences. The approach is designed to be flexible, allowing adjustments based on the preferences of the public collaborators.We acknowledge that we may face some difficulties with our approach. This may include challenges in recruitment of public collaborators, dealing with absence and attrition, and creating a safe space for discussing sensitive topics. Collaborators from both academic and lived backgrounds may also experience barriers in knowledge and capacity. This protocol suggests activities to address and overcome these challenges. We emphasise the need for ongoing evaluation and transparency in public involvement and engagement approaches within school settings.

"It's changing our lives, not for the better. It's important that we have a say". The role of young people in informing public health and policy decisions about gambling marketing.

BACKGROUND: Marketing has a significant impact on the normalisation of gambling for youth across the globe. This has included shaping positive attitudes towards gambling, as well as increasing the social and cultural acceptance of gambling - particularly aligned with valued activities such as sport. Because of this, public health experts argue that gambling marketing poses a significant risk to the health and wellbeing of youth. While young people are increasingly exposed to, and impacted by marketing for gambling products, they are rarely consulted about policy issues and options. This study aimed to explore young Australians' perceptions of current policy responses to gambling advertising, whether they thought young people should be involved in discussions and decisions about gambling marketing regulations, and their perceptions of the duty of governments to protect young people from gambling industry marketing strategies. METHODS: Qualitative focus groups (n = 22) were held with n = 64, 12-17 year olds in the Australian states of Victoria and New South Wales. Participants were asked to reflect on current gambling policies, particularly relating to marketing, what they thought should be done about gambling marketing, and if and how young people should be included in public health responses to gambling. An interpretivist 'Big Q' approach to reflexive thematic analysis was used. RESULTS: Young people highlighted the need for more effective regulations around the content and frequency of gambling marketing. They also wanted to see more realistic representations of the negative impacts of gambling to counter persistent positive commercial marketing messages. Most thought that young people should be given an opportunity to have a say about responses to gambling due to their unique experiences. Participants identified mechanisms to increase young people's engagement in decision making, such as direct lines of communication to different levels of government, involvement in research, and diversifying ways of engagement. Specific recommendations included more regulatory action such as bans on gambling advertising. CONCLUSIONS: Creating formal structures that facilitate the inclusion of young people's perspectives in decisions made about gambling can result in more innovative and effective strategies to prevent the harms from gambling industry products, promotions, and practices.

Gender-Based Dating Violence and Social Media among Spanish Young People: A Qualitative Study.

(1) Gender-based dating violence is common among adolescents. This violence has global repercussions and can have immediate and delayed consequences on health. Also, cases of dating violence and sexual abuse using technology are increasing. The aim of this research is to describe and understand the perceptions and experiences of Spanish university students aged 18 to 22, about gender-based dating violence and its perpetuation through social media. (2) A qualitative descriptive study was used, following the five consolidated criteria for reporting and publishing COREQ qualitative research. (3) The inductive analysis of the data obtained in the focus group session and the individual interviews of the twelve participants was organised into three major themes: the concept of gender violence that Spanish youth have, the education they have received on gender-based violence and whether they consider that social media are a way to exercise this type of violence. (4) Spanish youth have a broad vision of the attitudes and behaviours that make up gender-based dating violence in an affective relationship. The education received at home is of vital importance for young people, but not all receive it. Social media are frequent tools through which many young people perpetuate controlling partner violence and normalise aspects and situations of gender violence, making it necessary to stress them in prevention programs.

Using a novel methodology to map Post-COVID services for children and young people in England: a web-based systematic search.

BACKGROUND: Post-COVID Condition (PCC), also known as 'Long COVID,' refers to persistent symptoms following a coronavirus 2 (SARS-CoV-2) infection. The prevalence of PCC in children and adolescents varies, impacting multiple body systems and affecting daily functioning. Specialised paediatric hubs were established in England to address the needs of young individuals with PCC. Additional local services also emerged, yet patients report challenges accessing services. To better understand the landscape of paediatric PCC services, we used a novel methodology using a web-based systematic search. METHODS: A web-based search was conducted in July 2023 using DEVONagent Pro. Search terms related to Long COVID and Pediatrics in England. Eligible sources providing information on PCC services for children and young people were included. A supplementary manual search and NHS England Post-COVID Network were also consulted. Data extraction included service location, characteristics, and referral pathways. Population estimates were derived from UK Census data. RESULTS: Among 342 identified records, 27 services met eligibility criteria, distributed unevenly across regions. Specialised hubs covered 13 locations, while additional services were concentrated in the South of England and London. Services varied in team composition, age range treated, and support offered. A lack of standardised approaches for paediatric PCC was evident. DISCUSSION: We used a novel methodology for systematically mapping online resources, providing valuable insights into service accessibility and aiding the identification of potential gaps. We observed geographical disparities in access to paediatric PCC services and the absence of standardised approaches in managing symptoms. Given the challenges faced by young individuals seeking support for their PCC the need for equitable and standardised care became apparent. The study contributes to closing the research-practice gap and calls for further research to identify effective treatments for paediatric PCC, acknowledging the diversity of reported symptoms and the importance of tailored approaches.

'It depends on where you were born here in the North East, there's not really many job opportunities compared to in the South': young people's perspectives on a North-South health divide and its drivers in England, UK.

BACKGROUND: Improving the public's understanding of how regional and socioeconomic inequalities create and perpetuate inequalities in health, is argued to be necessary for building support for policies geared towards creating a more equal society. However, research exploring public perceptions of health inequalities, and how they are generated, is limited. This is particularly so for young people. Our study sought to explore young people's lived experiences and understandings of health inequalities. METHODS: We carried out focus group discussions (n = 18) with 42 young people, aged 13-21, recruited from six youth organisations in England in 2021. The organisations were located in areas of high deprivation in South Yorkshire, the North East and London. Young people from each organisation took part in three interlinked focus group discussions designed to explore their (i) perceptions of factors impacting their health in their local area, (ii) understandings of health inequalities and (iii) priorities for change. Due to the Covid-19 pandemic, most discussions took place online (n = 15). However, with one group in the North East, we carried out discussions face-to-face (n = 3). Data were analysed thematically and we used NVivo-12 software to facilitate data management. RESULTS: Young people from all groups demonstrated an awareness of a North-South divide in England, UK. They described how disparities in local economies and employment landscapes between the North and the South led to tangible differences in everyday living and working conditions. They clearly articulated how these differences ultimately led to inequalities in people's health and wellbeing, such as linking poverty and employment precarity to chronic stress. Young people did not believe these inequalities were inevitable. They described the Conservative government as prioritising the South and thus perpetuating inequalities through uneven investment. CONCLUSIONS: Our study affords important insights into young people's perceptions of how wider determinants can help explain the North-South health divide in England. It demonstrates young people's contextualised understandings of the interplay between spatial, social and health inequalities. Our findings support calls for pro-equity policies to address the structural causes of regional divides in health. Further research, engaging young people in deliberative policy analysis, could build on this work.

Research Ethics of Involving Adolescents in Health Research Studies: Perspectives From Australia.

PURPOSE: Adolescent participation in health research studies is critical yet complex given the lack of clarity around issues such as consent. This study aimed to understand how those conducting research in Australia navigate research ethics in health research involving adolescents, through qualitative interviews. METHODS: Purposive sampling was used to recruit 23 researchers involved in adolescent health research using semi-structured in-depth interviews. Interviews were conducted via Zoom and audio-recorded after obtaining informed consent. Thematic analysis was used to construct themes and data were organised using NVivo. RESULTS: Two contrasting positions emerged from the data: (1) framing of adolescents as inherently vulnerable, their participation in research understood in terms of risk and protection and (2) adolescent engagement in research is understood in terms of empowerment, emphasising their capacity to make decisions about research participation. We traced these positions through three key themes, particularly in relation to the role of ethics committees: (1) competing positions as a result of inferior or superior knowledge about adolescent lives, (2) competing positions resulting in a risk averse or an empowerment approach, and (3) reflections on processes of obtaining consent which involves gatekeeping and tokenism. DISCUSSION: Our study highlights the contentious topic of navigating ethics committee requirements for the needs of adolescents. Majority of participants felt the current research ethics establishment is not favourable for researchers or adolescents themselves. While it is imperative that perceptions of ethics committees also be studied in the future, our study provides preliminary understanding of how experiences and perceptions shape how researchers interact with the research ethics establishment.

A two-pronged approach to understanding reciprocity and mental health relationship in developing countries: evidence from young informal construction workers in Nigeria.

BACKGROUND: Mental health problems disproportionately affect young people in developing countries. However, there is limited research on help-seeking behaviours and the social support systems that improve mental wellbeing among vulnerable youth populations. OBJECTIVE: This mixed-methods study aimed to examine the relationship between social support reciprocity and mental health among young informal construction workers in Nigeria, a population at high-risk for occupational and socioeconomic stressors. METHODS: A cross-sectional survey was administered to 686 informal workers to measure reciprocity, mental health-related quality of life, and covariates. In-depth interviews with 32 participants provided qualitative context. RESULTS: Quantitative analyses showed 25% of participants reported poor mental health. Reciprocity positively predicted mental health after controlling for covariates. Qualitative findings revealed reciprocity occurs directly between individuals as well as indirectly through trade unions and religious groups. Indirect exchanges through groups helped address limitations of direct support due to limited resources. CONCLUSIONS: This study fills important gaps in understanding how social relationships impact mental health in developing country contexts. Findings emphasize the role of collective action and community-based support systems in promoting mental wellbeing among vulnerable populations. Insights can inform culturally relevant, systems-level mental health interventions.

Conceptualisation of health among young people: a protocol for systematic review and thematic synthesis of qualitative studies.

BACKGROUND: Self-reported health is a widely used health indicator in surveys and questionnaires. The measure gained attention when research identified its association with mortality in the 1970s and 1980s. The measure is also associated with morbidity and other health outcomes such as the utilisation of health services. Self-reported health is a particularly useful measure for young people because this age group is generally clinically healthy. However, it is known that many chronic conditions have long latency periods that are initiated early in life. Because of its predictive nature, self-reported health can be used to estimate young people's current and future health. Despite its widespread use, however, self-reported health remains a poorly understood concept. This paper presents the protocol for a systematic review that will identify and synthesise qualitative studies that investigate the factors that are considered by young people when they assess their health, and when they talk about health overall. METHODS: The population of the review is young people aged 10-24 years, with or without health conditions. We will search the databases of MEDLINE (Ovid®), PsycINFO (APA PsycNet), ProQuest Sociology Collection, and Web of Science Core Collection™. We will also utilise techniques of reference checking and forward citation searching, as this strategy has been shown to result in a higher number of high-quality studies in social science systematic reviews. Google Scholar and Google Search were used during preliminary searches; Google Scholar will be utilised for forward citation searching. We will include studies written in English, German, or Finnish; there will be no lower date limit. One reviewer will screen all citations. A second reviewer will independently screen a sample of 20% of the abstracts. Data will be extracted by one researcher, two other researchers will independently review all data extracted, and quality appraisal will be completed by the first reviewer. We will utilise the Quality Framework for the appraisal of included articles and thematic synthesis of qualitative studies. DISCUSSION: The results of this systematic review will improve the understanding of the factors that are considered during the self-assessments of health; this will improve the interpretation of the results of quantitative research. Also, an improved understanding of the conceptualisation of health will inform the development of health policies and interventions that support young people's health. SYSTEMATIC REVIEW REGISTRATION: PROSPERO CRD42022367519.

Development of a Novel Mobile Health App to Empower Young People With Type 1 Diabetes to Exercise Safely: Co-Design Approach.

BACKGROUND: Blood glucose management around exercise is challenging for youth with type 1 diabetes (T1D). Previous research has indicated interventions including decision-support aids to better support youth to effectively contextualize blood glucose results and take appropriate action to optimize glucose levels during and after exercise. Mobile health (mHealth) apps help deliver health behavior interventions to youth with T1D, given the use of technology for glucose monitoring, insulin dosing, and carbohydrate counting. OBJECTIVE: We aimed to develop a novel prototype mHealth app to support exercise management among youth with T1D, detail the application of a co-design process and design thinking principles to inform app design and development, and identify app content and functionality that youth with T1D need to meet their physical activity goals. METHODS: A co-design approach with a user-centered design thinking framework was used to develop a prototype mHealth app "acT1ve" during the 18-month design process (March 2018 to September 2019). To better understand and respond to the challenges among youth with diabetes when physically active, 10 focus groups were conducted with youth aged 13-25 years with T1D and parents of youth with T1D. Thereafter, we conducted participatory design workshops with youth to identify key app features that would support individual needs when physically active. These features were incorporated into a wireframe, which was critically reviewed by participants. A beta version of "acT1ve" was built in iOS and android operating systems, which underwent critical review by end users, clinicians, researchers, experts in exercise and T1D, and app designers. RESULTS: Sixty youth with T1D, 14 parents, 6 researchers, and 10 clinicians were engaged in the development of "acT1ve." acT1ve included key features identified by youth, which would support their individual needs when physically active. It provided advice on carbohydrates and insulin during exercise, information on hypoglycemia treatment, pre- and postexercise advice, and an educational food guide regarding exercise management. "acT1ve" contained an exercise advisor algorithm comprising 240 pathways developed by experts in diabetes and exercise research. Based on participant input during exercise, acT1ve provided personalized insulin and carbohydrate advice for exercise lasting up to 60 minutes. It also contains other features including an activity log, which displays a complete record of the end users' activities and associated exercise advice provided by the app's algorithm for later reference, and regular reminder notifications for end users to check or monitor their glucose levels. CONCLUSIONS: The co-design approach and the practical application of the user-centered design thinking framework were successfully applied in developing "acT1ve." The design thinking processes allowed youth with T1D to identify app features that would support them to be physically active, and particularly enabled the delivery of individualized advice. Furthermore, app development has been described in detail to help guide others embarking on a similar project. TRIAL REGISTRATION: Australian New Zealand Clinical Trials Registry ACTRN12619001414101; https://tinyurl.com/mu9jvn2d.

Online, group, low-intensity psychological interventions for adults, children and parents with food allergy.

BACKGROUND: Food allergy (FA) impairs psychological wellbeing due to constant vigilance, planning and preparation, dietary and social restrictions and fear of accidental ingestion, though psychological interventions are sparse. OBJECTIVE: The study examines online, group, low-intensity psychological interventions for adults, children and young people (CYP), and parents with food allergies. METHODS: The feasibility and signal of efficacy of a psychological interventions for adults, CYP and parents with FA was assessed by randomised controlled trial. Participants were randomised to receive the psychological intervention or treatment as usual. The intervention consisted of two, three-hour, manualised, online sessions, spaced oneweek apart. All participants completed relevant FA quality of life (FAQLQ) and worry (Penn State Worry Questionnaire) measures, in addition to exploratory outcomes, at baseline, 1- and 3-months. RESULTS: A total of 129 participants (n=44 adults, n=52 CYP and n=33 parents) were recruited and randomised; 95 (74%) (n=36 adults, n=35 CYP and n=24 parents,) were retained at the 3-months. Due to baseline differences, mean change was utilised for parent and CYP outcomes. The psychological intervention demonstrated large FAQLQ benefits across adults (g=-1.12, 95%CI -0.41, -1.28), CYP (g=1.23, 0.51, 1.95) and parents (g=1.43, 95%CI 0.54, 2.30),) compared to controls at 3-months. CONCLUSION: This study provides encouraging findings regarding the feasibility of online, group, lowintensity psychological interventions, in terms of recruitment and retention as well as a signal of efficacy on FAQLQ. A definitive trial including health economic analysis and FA-specific psychological measures with consideration of best routes to implementation, is warranted.

School-based interventions targeting substance use among young people in low-and-middle-income countries: A scoping review.

BACKGROUND AND AIM: Globally, harmful substance use is among the leading causes of premature deaths in the general population, and most of these behaviours are initiated during pre-adolescence to young adulthood. Preventing the onset or reducing the prevalence of substance use among young people is thus a global health priority. Diverse school-based interventions have been implemented in low-and-middle-income countries (LMICs); however, evidence regarding their theoretical underpinnings and core components is lacking. The aim of this scoping review was to identify the underlying (social/behavioural) theories, models or frameworks (TMF) and core (practical) components of school-based interventions in LMICs aimed at preventing the onset or reducing the prevalence of substance use among young people. METHODS: Using the Joanna Briggs Institute (JBI) guidance for conducting scoping reviews, we searched scientific literature databases for articles published from 1995 to 2022. A further search was conducted using the reference lists of included articles. We selected randomized and non-randomized trials of school-based interventions in LMICs that aimed at preventing the onset or reducing the prevalence of substance use among young people. We used Covidence software to screen titles and abstracts, as well as full texts. We then extracted the data and analysed it using a descriptive content analysis approach. Two reviewers conducted the screening, extraction and data analysis and discussed discrepancies, and clarified doubts and uncertainties through consultation with the other team members. FINDINGS: A total of 58 articles were included in the review. Most articles (63.8%) used either a single or combination of two or more TMFs to inform their interventions. The most widely used TMF was social learning theory followed by theory of planned behaviour. We identified six core components of substance use prevention interventions: education, school environment, school policy, parental involvement, peer engagement and counselling. CONCLUSION: This scoping review outlines the core components of school-based substance use prevention interventions used in low-and-middle-income countries and the common theories, models or frameworks that underpin the design of those interventions.