Evidence map›Paper›PMID 30585148›Full record

ArticlePublic health nutrition2019

Nutrient profile and energy cost of food sold by informal food vendors to learners in primary and secondary schools in the Eastern Cape, South Africa.

Mieke Faber, Anniza de Villiers, Jillian Hill, Paul J van Jaarsveld, Alice P Okeyo, Eunice Seekoe

Abstract read
In one paragraph

Article in Public health nutrition, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
10citing papers in PubMed, 2 pooled it
–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

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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

10 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Pooled it
  2. Impact of Street Food Availability on Nutritional Intake and Diet-Related Health Outcomes: A Systematic Review.Obesity reviews : an official journal of the International Association for the Study of Obesity · 2025
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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

6 authors.

Mieke FaberNon-Communicable Diseases Research Unit, South African Medical Research Council, PO Box 19070, Tygerberg 7505, South Africa.ORCID http://orcid.org/0000-0002-8878-254X
Anniza de VilliersNon-Communicable Diseases Research Unit, South African Medical Research Council, PO Box 19070, Tygerberg 7505, South Africa.
Jillian HillNon-Communicable Diseases Research Unit, South African Medical Research Council, PO Box 19070, Tygerberg 7505, South Africa.ORCID http://orcid.org/0000-0003-1646-6174
Paul J van JaarsveldNon-Communicable Diseases Research Unit, South African Medical Research Council, PO Box 19070, Tygerberg 7505, South Africa.
Alice P OkeyoFaculty of Health Sciences, University of Fort Hare, East London, South Africa.
Eunice SeekoeFaculty of Health Sciences, University of Fort Hare, East London, South Africa.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveTo assess type, nutrient profile and cost of food items sold by informal vendors to learners; and to determine nutrient content of corn-based processed snacks frequently sold.

designCross-sectional survey.

settingQuintile 1 to 3 schools (n 36) randomly selected from six education districts; Eastern Cape, South Africa.

participantsInformal food vendors (n 92) selling inside or immediately outside the school premises.

resultsFood items sold at most schools were corn-based processed snacks (94 % of schools), sweets (89 %), lollipops (72 %) and biscuits (62 %). Based on the South African Nutrient Profiling model, none of these foods were profiled as healthy. Foods less commonly sold were fruits (28 % of schools) and animal-source foods; these foods were profiled as healthy. Mean (sd) energy cost (per 418 kJ (100 kcal)) was highest for animal-source foods (R2·95 (1·16)) and lowest for bread and vetkoek (R0·76 (0·21)), snacks (R0·76 (0·30)) and confectionery products (R0·70 (0·28)). The nutrient profiling score was inversely related to the energy cost of the food item (r = -0·562, P = 0·010). Compared with brand-name corn-based processed snacks, non-branded snacks had lower energy (2177 v. 2061 kJ; P = 0·031) content per 100 g. None of the brand-name samples contained sucrose; six of the nine non-branded samples contained sucrose, ranging from 4·4 to 6·2 g/100 g.

conclusionsFoods mostly sold were unhealthy options, with the healthier food items being more expensive sources of energy.

Indexed as

Corn-based processed snacksFood vendorsSchool food environment

Identifiers

PMID30585148
PMCPMC10260538

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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.