Trial reportPloS one2019
Effects of a nutritional intervention using pictorial representations for promoting knowledge and practices of healthy eating among Brazilian adolescents.
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 13 papers, 2 of them syntheses 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
13 citing papers in PubMed, 2 syntheses or guidelines pooled it.
- School-based health and nutrition interventions addressing double burden of malnutrition and educational outcomes of adolescents in low- and middle-income countries: A systematic review.Maternal & child nutrition · 2025Pooled it
- Effects of nutritional intervention strategies in the primary prevention of overweight and obesity in school settings: systematic review and network meta-analysis.BMJ medicine · 2022Pooled it
- Development and Validation of a Photographic Food Atlas for Portion Size Estimation and Educational Use in Türkiye.Journal of human nutrition and dietetics : the official journal of the British Dietetic Association · 2026Article
- Development and validation of an educational comic book on healthy eating in early childhood.Journal of nutritional science · 2026Article
- Community-based interventions to improve adolescent nutrition: a scoping review.BMC public health · 2025Article
- Review
- The impact of income level on skeletal muscle health in rural Chinese older residents: a study of mediating effects based on dietary knowledge.Frontiers in public health · 2024Article
- Impact of educational intervention in promoting KAP of food label information to make healthier food choices among adolescents in Bangalore City.Journal of family medicine and primary care · 2023Article
- Stages of change and self-efficacy are related to consumption of food markers among Brazilian adolescents and young adults.Frontiers in public health · 2022Article
- Tailored smartphone intervention to promote healthy eating among Brazilian adolescents: a randomised controlled trial protocol.BMJ open · 2020Article
- The Color Nutrition Information Paradox: Effects of Suggested Sugar Content on Food Cue Reactivity in Healthy Young Women.Nutrients · 2020Article
- Effect of a Nurse-Led Intervention on Knowledge of the Modifiable Risk Behaviors of Cardiovascular Disease: A Randomized Controlled Trial.SAGE open nursingArticle
- Poster Guided Reinforcement Learning technique on sugar intake and oral hygiene knowledge, attitude and practices among adolescents: A cluster randomized controlled trial.Journal of oral biology and craniofacial researchArticle
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
4 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
This study aimed to evaluate the effect of a nutritional intervention involving a problem-raising approach and the use of pictorial representations on the promotion of knowledge and practices of healthy eating among adolescents. This randomized study included 461 adolescents from public schools in Brasilia, Federal District, Brazil (intervention group: 273 students from four schools; control group: 188 students from three schools). Mean age was 14.8±1.0, and 52.9% were boys. The intervention consisted of three meetings with interactive activities about principles of healthy eating, food classification, importance of reading labels and analyzing food advertising critically, and representations of healthy and unhealthy meals and their sugar, salt, and fat content. Pictorial materials consisted of food drawings, food models, and a food packaging model. Controls were not exposed to any activity. Dietary knowledge, consumption, and behaviors were the variables of interest. The intervention group showed a higher mean score of correct answers to questions about dietary knowledge than the control group (p = 0.0006), with higher odds of correctly answering questions about in natura (OR: 3.7; 95% CI: 1.9-6.6), minimally processed (OR: 3.6; 95% CI: 1.9-6.4), processed (OR: 2.2; 95% CI: 1.1-4.3), and ultra-processed foods (OR: 3.5; 95% CI: 1.8-6.6) and composition of ultra-processed foods (OR: 2.4; 95% CI: 1.3-4.4). Participants in the intervention group were also 2.5 times more likely to correctly answer questions about the importance of the dietary environment (95% CI: 1.1-5.5) and caution with food advertising (95% CI: 1.2-5.3) than controls. Increased weekly consumption of vegetables (p = 0.0077; OR: 2.4; 95% CI: 1.26-4.51) and reduced consumption of soft drinks (p = 0.0212; OR: 0.36; 95% CI: 0.15-0.86) were observed in the intervention group compared to the control group. The proposed intervention increased adolescents' knowledge and improved some of their dietary habits. Educational activities using a problem-raising approach and pictorial representations of food appear to be effective in promoting healthy eating practices among adolescents.
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.