Evidence map›Paper›PMID 36976487›Full record

ArticleCanadian journal of public health = Revue canadienne de sante publique2023

School nutrition policy and diet quality of children and youth: a quasi-experimental study from Canada.

Victoria Gaudin, Saverio Stranges, Piotr Wilk, Sisira Sarma

Open access · greenAbstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Canadian journal of public health = Revue canadienne de sante publique, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed
1.2field-weighted citation impact, top 22% of its field
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

5 citing papers in PubMed, 4 citations in OpenAlex.

  1. Inequities in Children's Food Environment: A Comparison between Slum and Non-slum Settings in Urban Bangladesh.Journal of urban health : bulletin of the New York Academy of Medicine · 2026
    Article
  2. Review
  3. From policy to plate: strengthening implementation of Canada's national school food policy.Canadian journal of public health = Revue canadienne de sante publique · 2026
    Article
  4. Article
  5. Article
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

4 authors at 2 institutions in 4 countries.

Victoria GaudinDepartment of Epidemiology and Biostatistics, Schulich School of Medicine and Dentistry, Western Centre for Public Health and Family Medicine, University of Western Ontario, Room 313, 11465 Richmond Street, London, ON, N6G 2M1, Canada.
Saverio StrangesDepartment of Epidemiology and Biostatistics, Schulich School of Medicine and Dentistry, Western Centre for Public Health and Family Medicine, University of Western Ontario, Room 313, 11465 Richmond Street, London, ON, N6G 2M1, Canada.
Piotr WilkDepartment of Epidemiology and Biostatistics, Schulich School of Medicine and Dentistry, Western Centre for Public Health and Family Medicine, University of Western Ontario, Room 313, 11465 Richmond Street, London, ON, N6G 2M1, Canada.
Sisira SarmaDepartment of Epidemiology and Biostatistics, Schulich School of Medicine and Dentistry, Western Centre for Public Health and Family Medicine, University of Western Ontario, Room 313, 11465 Richmond Street, London, ON, N6G 2M1, Canada. ssarma2@uwo.ca.ORCID 0000-0001-9174-765X
Western University · CAUniversity of Bern · CH

Funding

CIHR
6 · The paper itself

Abstract

objectiveWe investigated the impact of mandatory school nutrition policy on diet quality of Canadian school children using a quasi-experimental study design.

methodsUsing 24-h dietary recall data from the 2004 Canadian Community Health Survey (CCHS) Cycle 2.2 and 2015 CCHS - Nutrition, we constructed the Diet Quality Index (DQI). We used multivariable difference-in-differences regressions to quantify the DQI scores associated with school nutrition policy. We conducted stratified analyses by sex, school grade, household income, and food security status to gain additional insights into the impact of nutrition policy.

resultsWe found that mandatory school nutrition policy was associated with an increased DQI score by 3.44 points (95% CI: 1.1, 5.8) during school-hours in intervention provinces relative to control provinces. DQI score was higher among males (3.8 points, 95% CI: 0.6, 7.1) than among females (2.9 points, 95% CI: -0.5, 6.3), and the score among students in elementary schools was higher (5.1 points, 95% CI: 2.3, 8.0) than that among high school students (0.4 points, 95% CI: -3.6, 4.5). We also found that DQI scores were higher for middle-high income and food secure households.

conclusionProvincial mandatory school nutrition policy was associated with better diet quality among children and youth in Canada. Our findings suggest that other jurisdictions may consider implementing mandatory school nutrition policy.

Indexed as

DietSchoolsAdolescentCanadaChildFemaleHumansMaleNutrition PolicyStudentsCanadaChildrenDiet qualityDifference-in-differencesSchool nutrition policyYouth

Identifiers

PMID36976487
PMCPMC10351299
OpenAlexW4361190799

What OpenQuestion holds

Textmetadata
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.