Evidence map›Paper›PMID 34852166›Full record

SynthesisRevista de saude publica2021

Hepatitis B prevalence in Brazilian waste pickers: a systematic review with meta-analysis.

Gabriel Souza-Silva, Marcos Paulo Gomes Mol

Abstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in Revista de saude publica, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
3citing 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

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

  1. Pooled it
  2. Sero-prevalence of hepatitis B virus infection among the municipal waste collectors in Aden, Yemen.International microbiology : the official journal of the Spanish Society for Microbiology · 2026
    Article
  3. Review
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

2 authors.

Gabriel Souza-SilvaFundação Ezequiel Dias. Diretoria de Pesquisa e Desenvolvimento. Belo Horizonte, MG, Brasil.ORCID http://orcid.org/0000-0002-3740-4346
Marcos Paulo Gomes MolFundação Ezequiel Dias. Diretoria de Pesquisa e Desenvolvimento. Belo Horizonte, MG, Brasil.ORCID http://orcid.org/0000-0002-2568-3579

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveTo describe the hepatitis B prevalence in Brazilian waste pickers.

methodsWe performed a literature search in the SciELO, Biblioteca Virtual em Saúde (BVS), PubMed and Web of Science databases using the descriptors: "hepatitis B" AND ("informal recycling" OR "waste picker" OR "recyclable waste collectors" OR "solid waste segregator") AND ("recyclable waste" OR "solid waste") AND Brazil. Epidemiological studies on HBV in Brazilian waste pickers published prior to February 2020 were included and evaluated for quality and bias using a funnel plot.

resultsThis meta-analysis consisted of five articles. Prevalence of HBV surface antigen seropositivity was 14% (95%CI: 6%-22%) in Brazilian waste pickers.

conclusionHBV prevalence in Brazilian waste pickers remains high. There should be more campaigns showing the importance of vaccination and personal protective equipment use.

Indexed as

Hepatitis BRefuse DisposalBrazilHumansPrevalenceRecycling

Identifiers

PMID34852166
PMCPMC8621438

What OpenQuestion holds

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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.