Trial reportPloS one2019
The role of normative beliefs in the mediation of a school-based drug prevention program: A secondary analysis of the #Tamojunto cluster-randomized trial.
Trial report in PloS one, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
What it found
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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.
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Who cites it
6 citing papers in PubMed.
- Skill vs. Disposition: Examining Paths of Intervention Effects in an Alcohol and Drug Use Prevention Trial Targeting U.S. Adolescents.Journal of prevention (2022) · 2026Article
- Methodological characteristics of evaluative studies of drug prevention programs in Brazil: scoping review.Revista latino-americana de enfermagem · 2025Article
- Prevention of Alcohol Consumption Programs for Children and Youth: A Narrative and Critical Review of Recent Publications.Frontiers in psychology · 2022Review
- Article
- Traps in cannabis policies in Brazil.Revista brasileira de psiquiatria (Sao Paulo, Brazil : 1999)Article
- Direct healthcare costs and their relationships with age at start of drug use and current pattern of use: a cross-sectional study.Sao Paulo medical journal = Revista paulista de medicinaArticle
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
aimsTo investigate the mediating effects of normative beliefs of drug use on the effects of the #Tamojunto school-based prevention program (Unplugged).
designSecondary analysis of a cluster randomized controlled trial.
settingBrazil. Participants: A total of 6,391 adolescents (12.68 y.o) from 72 public schools in 6 Brazilian cities. Intervention: Schools were assigned to an experimental condition (#Tamojunto curriculum) or a control condition (no prevention program). Measurements: Baseline data were collected prior to program implementation, and follow-up data were collected 9 and 21 months later. The substances examined were alcohol (including binge drinking), tobacco, marijuana and inhalants. Five in-parallel mediation models evaluated whether the positive and negative beliefs were mediators of the likely effects of the intervention on drug use.
findingsLack of evidences regarding differences in normative beliefs or drug use were found between the intervention and control groups. However, there was a clear association between negative drug beliefs and lower consumption (i.e. OR = 0.78; 95% CI 0.70; 0.87, for cannabis use) as well as between positive drug beliefs and higher consumption (i.e. OR = 1.77; 95% CI 1.56; 2.02, for cannabis use) independent of the assigned group.
conclusionsThese results suggest that there is a lack of evidence that the program impact the normative beliefs, as proposed by the theoretical model of the program, suggesting that modifications are needed to produce the intended effect of the program. Negative normative beliefs seem to be a potential protective factor for drug use, but the program's effect itself on drug use via normative beliefs was not found to be statistically significant. Program activities intended to affect normative beliefs should be improved.
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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.