Evidence map›Paper›PMID 34212834›Full record

SynthesisPublic health nutrition2021

Prevalence of childhood anaemia in Brazil: still a serious health problem: a systematic review and meta-analysis.

Carlos Alberto Nogueira-de-Almeida, Fábio da Veiga Ued, Luiz Antonio Del Ciampo, Edson Zangiacomi Martinez, Ivan Savioli Ferraz, Andrea Aparecida Contini, Franciele Carolina Soares da Cruz, Raquel Farias Barreto Silva, Maria Eduarda Nogueira-de-Almeida, Joel Alves Lamounier

Abstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in Public health nutrition, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
10citing papers in PubMed, 1 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

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

10 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
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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

10 authors.

Carlos Alberto Nogueira-de-AlmeidaMedical Department, Federal University of São Carlos, Brazil - DMED UFSCAR, Rod. Washington Luiz, km 235, São Carlos, SP13565-905, Brazil.ORCID 0000-0003-1272-4404
Fábio da Veiga UedNutrition School, University of São Paulo, Brazil - FMRP-USP, Ribeirao Preto, Brazil.
Luiz Antonio Del CiampoNutrition School, University of São Paulo, Brazil - FMRP-USP, Ribeirao Preto, Brazil.
Edson Zangiacomi MartinezNutrition School, University of São Paulo, Brazil - FMRP-USP, Ribeirao Preto, Brazil.ORCID 0000-0002-0949-3222
Ivan Savioli FerrazNutrition School, University of São Paulo, Brazil - FMRP-USP, Ribeirao Preto, Brazil.
Andrea Aparecida ContiniMedical Department, Federal University of São Carlos, Brazil - DMED UFSCAR, Rod. Washington Luiz, km 235, São Carlos, SP13565-905, Brazil.
Franciele Carolina Soares da CruzAssociation of Parents and Friends of Disabled People, Brazil - APAE, Jaboticabal, Brazil.
Raquel Farias Barreto SilvaNutrition School, University of São Paulo, Brazil - FMRP-USP, Ribeirao Preto, Brazil.
Maria Eduarda Nogueira-de-AlmeidaNutrition School, University of São Paulo, Brazil - FMRP-USP, Ribeirao Preto, Brazil.
Joel Alves LamounierMedical School, Federal University of Sao Joao Del Rei, Brazil - DMED UFSJ, Sao Joao Del Rei, Brazil.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveTo estimate the prevalence of anaemia in Brazilian children up to 83·9 months old.

designSystematic review and meta-analysis, using databases PubMed, Scopus, SciELO, Lilacs, Google Scholar, Periódicos Capes, Arca, Biblioteca Virtual em Saúde, Microsoft Academic Search and Cochrane Library using search terms: anaemia, prevalence, child and Brazil. PROSPERO Registration number: CRD42020208818.

settingCross-sectional, cohort, case-control and intervention studies published between 2007 and 2020 were searched, excluding those who assessed children with an illness or chronic condition. The main outcome was anaemia prevalence. Random effects models based on the inverse variance method were used to estimate pooled prevalence measures. Sensitivity analyses removed studies with high contribution to overall heterogeneity.

participantsFrom 6790 first screened, 134 eligible studies were included, totalling 46 978 children aged zero to 83·9 months analysed, with adequate regions representativeness.

resultsPooled prevalence of anaemia was 33 % (95 % CI 30, 35). Sensitivity analyses showed that withdrawal of studies that contributed to high heterogeneity did not influence national average prevalence.

conclusionsChildhood anaemia is still a serious public health problem in Brazil, exposing 33 % of Brazilian children to the anaemia repercussions. The main limitation of the study is the estimation of national prevalence based on local surveys, but a large number of studies were included, with representation in all regions of the country, giving strength to the results. In Brazil, more public policies are needed to promote supplementation, fortification and access to healthy eating to reduce the high level of anaemia among children.

Indexed as

AnemiaBrazilCase-Control StudiesChildChild, PreschoolCross-Sectional StudiesHumansInfantInfant, NewbornPrevalenceAnaemiaBrazilChildInfantIron deficiencyPreschoolPrevalence

Identifiers

PMID34212834
PMCPMC11148596

What OpenQuestion holds

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Registered trials

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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.