Trial reportInternational journal of environmental research and public health2023
Effects of an App-Based Intervention Program to Reduce Substance Use, Gambling, and Digital Media Use in Adolescents and Young Adults: A Multicenter, Cluster-Randomized Controlled Trial in Vocational Schools in Germany.
Trial report in International journal of environmental research and public health, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 1 of them a synthesis that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
15 citing papers in PubMed, 1 synthesis or guideline pooled it, 21 citations in OpenAlex.
- Review Article: The effectiveness of school-based interventions for reducing screen time - a systematic review and meta-analysis.Child and adolescent mental health · 2025Pooled it
- Usage of an App-Based Addiction Prevention Program for German Vocational Students: Secondary Analysis of Data From a Cluster Randomized Controlled Trial.Journal of medical Internet research · 2025Trial
- Prevention Needs and Target Behavior Preferences in an App-Based Addiction Prevention Program for German Vocational School Students: Cluster Randomized Controlled Trial.JMIR mHealth and uHealth · 2025Trial
- Effectiveness of a Mobile Phone-Delivered Multiple Health Behavior Change Intervention (LIFE4YOUth) in Adolescents: Randomized Controlled Trial.Journal of medical Internet research · 2025Trial
- Mobile App Intervention to Reduce Substance Use, Gambling, and Digital Media Use in Vocational School Students: Exploratory Analysis of the Intervention Arm of a Randomized Controlled Trial.JMIR mHealth and uHealth · 2024Trial
- App-Based Addiction Prevention at German Vocational Schools: Implementation and Reach for a Cluster-Randomized Controlled Trial.Prevention science : the official journal of the Society for Prevention Research · 2024Trial
- Effectiveness of an AI- and Gamification-Based Health Literacy Program for Improving Alcohol-Preventive Behaviors Among Hazardous-Drinking Vocational Students: A Quasi-Experimental Study.International journal of environmental research and public health · 2026Article
- Digital Intervention Components for Preventing and Reducing Substance Use in Adolescents and Emerging Adults: A Comprehensive Scoping Review.Journal of prevention (2022) · 2026Article
- Unpacking the theoretical role of fear of missing out in the relationship between social networking intensity and well-being among Indian college students.Discover mental health · 2025Article
- Scoping review of interventions aimed at promoting healthy screen use among adolescents.BMJ open · 2025Article
- Problematic Social Media Use Interventions for Mental Health Outcomes in Adolescents.Current psychiatry reports · 2025Review
- Cannabis use among adolescents and young adults in Germany: Study results and prevention measures offered by the Federal Institute of Public Health.Journal of health monitoring · 2025Article
- Mitigating Gambling-Related Harms in Children and Young People: A Scoping Review of Interventions.Journal of gambling studies · 2025Article
- [Cannabis use and cannabis use disorders].Der Nervenarzt · 2024Review
- [Substance use and the usage of social media, computer games, and gambling among apprentices at vocational schools].Bundesgesundheitsblatt, Gesundheitsforschung, Gesundheitsschutz · 2024Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
10 authors at 5 institutions in 3 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Vocational students are a risk group for problematic substance use and addictive behaviors. The study aim was to evaluate the effects of an app-based intervention on tobacco, e-cigarettes, alcohol, and cannabis use as well as gambling and digital media-related behaviors in the vocational school setting. A total of 277 classes with 4591 students (mean age 19.2 years) were consecutively recruited and randomized into an intervention (IG) or waitlist control group (CG). Students from IG classes received access to an app, which encouraged a voluntary commitment to reduce or completely abstain from the use of a specific substance, gambling, or media-related habit for 2 weeks. Substance use, gambling, and digital media use were assessed before and after the intervention in both groups with a mean of 7.7 weeks between assessments. Multi-level logistic regression models were used to test group differences. Intention-to-treat-results indicated that students from IG classes had a significantly larger improvement on a general adverse health behavior measure compared to CG (OR = 1.24,
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.