Evidence map›Paper›PMID 29843449›Full record

Trial reportNutrients2018

Are Front-of-Package Warning Labels More Effective at Communicating Nutrition Information than Traffic-Light Labels? A Randomized Controlled Experiment in a Brazilian Sample.

Neha Khandpur, Priscila de Morais Sato, Laís Amaral Mais, Ana Paula Bortoletto Martins, Carla Galvão Spinillo, Mariana Tarricone Garcia, Carlos Felipe Urquizar Rojas, Patrícia Constante Jaime

Abstract readRandomized Controlled Trial
PubMed Full text at PMC Publisher
In one paragraph

Trial report in Nutrients, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 77 papers.

0numbers the graph read from it
0cells of the map it votes in
77citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from 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.

2 · The registry

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.

3 · Its place in the literature

Who cites it

77 citing papers in PubMed.

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  18. Scoping review of evidence on front-of-pack warning labels and nutrition and health variables in Peru.Revista panamericana de salud publica = Pan American journal of public health · 2026
    Review
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17 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors.

Neha KhandpurCenter for Epidemiological Studies in Health and Nutrition (NUPENS), Faculty of Public Health, University of São Paulo, Av. Dr. Arnaldo, 715-Cerqueira César, São Paulo 01246-904, Brazil. neha.khandpur@usp.br.
Priscila de Morais SatoCenter for Epidemiological Studies in Health and Nutrition (NUPENS), Faculty of Public Health, University of São Paulo, Av. Dr. Arnaldo, 715-Cerqueira César, São Paulo 01246-904, Brazil. pri.sato@gmail.com.
Laís Amaral MaisBrazilian Institute for Consumer's Defense (Idec), R. Desembargador Guimarães, 21-Água Branca, São Paulo 05002-000, Brazil. lais.amaral@idec.org.br.
Ana Paula Bortoletto MartinsBrazilian Institute for Consumer's Defense (Idec), R. Desembargador Guimarães, 21-Água Branca, São Paulo 05002-000, Brazil. anapaula@idec.org.br.
Carla Galvão SpinilloResearch Group of Digital and Information Design, Department of Design, Federal University of Paraná, Rua General Cameiro, 460, Curitiba 80060-050, Brazil. cgspin@gmail.com.
Mariana Tarricone GarciaBrazilian Institute for Consumer's Defense (Idec), R. Desembargador Guimarães, 21-Água Branca, São Paulo 05002-000, Brazil. marianatarricone@gmail.com.
Carlos Felipe Urquizar RojasResearch Group of Digital and Information Design, Department of Design, Federal University of Paraná, Rua General Cameiro, 460, Curitiba 80060-050, Brazil. chilenus@gmail.com.
Patrícia Constante JaimeCenter for Epidemiological Studies in Health and Nutrition (NUPENS), Faculty of Public Health, University of São Paulo, Av. Dr. Arnaldo, 715-Cerqueira César, São Paulo 01246-904, Brazil. constant@usp.br.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundBrazil is currently debating the implementation of front-of-package labels. This study tested if Warning labels (WLs) improved consumer understanding, perceptions, and purchase intentions compared to Traffic-Light labels (TLLs) in 1607 Brazilian adults.

methodsIn this online, randomized controlled experiment participants saw images of 10 products and answered questions twice-once in a no-label, control condition and then again in a randomly assigned label condition. The relative differences in responses between WLs and TLLs between control and label conditions were estimated using one-way ANOVAs or Chi-square tests.

resultsPresenting WLs on products compared to TLLs helped participants: (i) improve their understanding of excess nutrient content (27.0% versus 8.2%,

conclusionsWLs would be more effective at improving consumer food choices.

Indexed as

Food LabelingHealth Knowledge, Attitudes, PracticeAdolescentAdultBrazilChoice BehaviorConsumer BehaviorFemaleFood PreferencesHealth BehaviorHumansMaleMiddle AgedNutritive ValueSocioeconomic FactorsYoung AdultBrazilfront-of-package labelshealth promotionrandomized controlled experimenttraffic-light labelswarning labels

Identifiers

PMID29843449
PMCPMC6024864

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

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.