Evidence map›Paper›PMID 34111802›Full record

ArticlePublic health2021

SARS-CoV-2 contact tracing among disadvantaged populations during epidemic intervals should be a priority strategy: results from a pilot experiment in Barcelona.

X Vallès, S Roure, L Valerio, I López-Muñoz, O Pérez-Quílez, L Soldevila, L Martín-Cano, O Estrada, M D Palacín, I Blanco and 3 more

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

Article in Public health, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
4citing papers in PubMed, 1 pooled it
0.5field-weighted citation impact, top 41% 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

4 citing papers in PubMed, 1 synthesis or guideline pooled it, 5 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. 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

13 authors at 3 institutions in 1 country.

X VallèsNorth Metropolitan International Health Program, Primary Care Unit, Universitat Autònoma de Barcelona, Institut Català de la Salut, Passatge dels Encants, s/n, 08914, Badalona, Catalonia, Spain. Electronic address: xvallesc.mn.ics@gencat.cat.
S RoureNorth Metropolitan International Health Program, Primary Care Unit, Universitat Autònoma de Barcelona, Institut Català de la Salut, Passatge dels Encants, s/n, 08914, Badalona, Catalonia, Spain; Infectious Diseases Unit, Hospital Universitari Germans Trias i Pujol, Universitat Autònoma de Barcelona, Institut Català de la Salut, C/ Canyet s/n, 08018, Badalona, Catalonia, Spain.
L ValerioNorth Metropolitan International Health Program, Primary Care Unit, Universitat Autònoma de Barcelona, Institut Català de la Salut, Passatge dels Encants, s/n, 08914, Badalona, Catalonia, Spain.
I López-MuñozNorth Metropolitan International Health Program, Primary Care Unit, Universitat Autònoma de Barcelona, Institut Català de la Salut, Passatge dels Encants, s/n, 08914, Badalona, Catalonia, Spain.
O Pérez-QuílezNorth Metropolitan International Health Program, Primary Care Unit, Universitat Autònoma de Barcelona, Institut Català de la Salut, Passatge dels Encants, s/n, 08914, Badalona, Catalonia, Spain.
L SoldevilaNorth Metropolitan International Health Program, Primary Care Unit, Universitat Autònoma de Barcelona, Institut Català de la Salut, Passatge dels Encants, s/n, 08914, Badalona, Catalonia, Spain; Infectious Diseases Unit, Hospital Universitari Germans Trias i Pujol, Universitat Autònoma de Barcelona, Institut Català de la Salut, C/ Canyet s/n, 08018, Badalona, Catalonia, Spain.
L Martín-CanoNorth Metropolitan International Health Program, Primary Care Unit, Universitat Autònoma de Barcelona, Institut Català de la Salut, Passatge dels Encants, s/n, 08914, Badalona, Catalonia, Spain.
O EstradaDirectorate of Innovation, North Metropolitan Health Area from Barcelona, Institut Català de la Salut, C/Canyet s/n, 08018, Badalona, Catalonia, Spain.
M D PalacínNorth Metropolitan International Health Program, Primary Care Unit, Universitat Autònoma de Barcelona, Institut Català de la Salut, Passatge dels Encants, s/n, 08914, Badalona, Catalonia, Spain.
I BlancoMicrobiology Unit, Hospital Universitari Germans Trias i Pujol, Universitat Autònoma de Barcelona, Institut Català de la Salut, C/Canyet s/n, 08018, Badalona, Catalonia, Spain.
J OrozcoEmergency Unit, Hospital Universitari Germans Trias i Pujol, Universitat Autònoma de Barcelona, Institut Català de la Salut, C/Canyet s/n, 08018, Badalona, Catalonia, Spain.
A EsquerràInternal Medicine Unit, Hospital Universitari Germans Trias i Pujol, Universitat Autònoma de Barcelona, Institut Català de la Salut, C/Canyet s/n, 08018, Badalona, Catalonia, Spain.
X VillanovaNorth Metropolitan International Health Program, Primary Care Unit, Universitat Autònoma de Barcelona, Institut Català de la Salut, Passatge dels Encants, s/n, 08914, Badalona, Catalonia, Spain.
Institut Català de la Salut · ESUniversitat Autònoma de Barcelona · ESHospital Universitari Germans Trias i Pujol · ES

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesThe aim of this study was to trace contacts of coronavirus disease 2019 (COVID-19) hospitalised patients and determine the risk factors of infection in urban areas. STUDY

designLongitudinal analysis of contacts identified from index cases.

methodsA contact tracing study was carried out in the Northern Metropolitan area of Barcelona, Spain, during the inter-epidemic lapse of May to July 2020, a period of low SARS-CoV-2 incidence. Index cases were notified from the referral hospital. Contacts were traced and followed up for 14 days. Reverse transcription polymerase chain reaction was performed on day 0 and day 14 for contacts.

resultsIn total, 368 contacts were identified from 81 index cases (median of seven contacts per index case), from which 308 were traced successfully. The median age of contacts was 28 years, 62% (223 of 368) were men. During the follow-up period, 100 contacts tested positive for COVID-19 (32.5% [95% confidence interval {CI} = 27.3-38.0]), with a secondary infection rate of 48.3% (95% CI = 40.8-55.9) among housemates. Clusters of index and respective contacts tended to aggregate within disadvantaged neighbourhoods (P < 0.001), and non-national index cases (N = 28, 34.1%) resulted in higher secondary infection rates compared with nationals (51.0% [95% CI = 41.0-60.9] vs 22.3% [95% CI = 16.8-28.8]; P < 0.001).

conclusionsDisadvantaged communities experience a disproportionate burden of COVID-19 and may act as infection reservoirs. Contact tracing with a cross-cutting approach among these communities is required, especially during inter-epidemic periods.

Indexed as

Contact TracingSocial Determinants of HealthVulnerable PopulationsAdultCOVID-19EpidemicsHumansIncidenceMaleMiddle AgedRisk FactorsSARS-CoV-2SpainContact tracingCOVID-19SARS-CoV-2Social determinants

Identifiers

PMID34111802
PMCPMC8106905
OpenAlexW3162086099

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.