Evidence map›Paper›PMID 37940843›Full record

ArticleBMC infectious diseases2023

Association between SARS-CoV-2 variants and post COVID-19 condition: findings from a longitudinal cohort study in the Belgian adult population.

Huyen Nguyen Thi Khanh, Laura Cornelissen, Diego Castanares-Zapatero, Robby De Pauw, Dieter Van Cauteren, Stefaan Demarest, Sabine Drieskens, Brecht Devleesschauwer, Karin De Ridder, Rana Charafeddine and 1 more

Open access · goldAbstract read
In one paragraph

Article in BMC infectious diseases, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed, 1 pooled it
4.1field-weighted citation impact, top 5% 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

16 citing papers in PubMed, 1 synthesis or guideline pooled it, 20 citations in OpenAlex.

  1. Pooled it
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  7. Long COVID Incidence Proportion in Adults and Children Between 2020 and 2024: An Electronic Health Record-Based Study From the RECOVER Initiative.Clinical infectious diseases : an official publication of the Infectious Diseases Society of America · 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

11 authors at 5 institutions in 1 country.

Huyen Nguyen Thi KhanhDepartment of Epidemiology and public health, Sciensano, Brussels, Belgium. khanhhuyenhnhuph@gmail.com.ORCID http://orcid.org/0000-0002-6104-0319
Laura CornelissenDepartment of Epidemiology and public health, Sciensano, Brussels, Belgium.
Diego Castanares-ZapateroBelgian Health Care Knowledge Centre (KCE), Brussels, Belgium.
Robby De PauwDepartment of Epidemiology and public health, Sciensano, Brussels, Belgium.
Dieter Van CauterenDepartment of Epidemiology and public health, Sciensano, Brussels, Belgium.
Stefaan DemarestDepartment of Epidemiology and public health, Sciensano, Brussels, Belgium.
Sabine DrieskensDepartment of Epidemiology and public health, Sciensano, Brussels, Belgium.
Brecht DevleesschauwerDepartment of Epidemiology and public health, Sciensano, Brussels, Belgium.
Karin De RidderDepartment of Epidemiology and public health, Sciensano, Brussels, Belgium.
Rana CharafeddineDepartment of Epidemiology and public health, Sciensano, Brussels, Belgium.
Pierre SmithDepartment of Epidemiology and public health, Sciensano, Brussels, Belgium.
Sciensano (Belgium) · BEBelgian Health Care Knowledge Centre (KCE) · BEGhent University · BEGhent University Hospital · BEUniversity of Antwerp · BE

Funding

Sciensano internal funding
6 · The paper itself

Abstract

backgroundWhile many studies on the determinants of post-COVID-19 conditions (PCC) have been conducted, little is known about the relationship between SARS-CoV-2 variants and PCC. This study aimed to assess the association between different SARS-CoV-2 variants and the probability of having PCC three months after the infection.

methodsThis study was a longitudinal cohort study conducted between April 2021 and September 2022 in Belgium. In total, 8,238 adults with a confirmed SARS-CoV-2 infection were followed up between the time of their infection and three months later. The primary outcomes were the PCC status three months post infection and seven PCC symptoms categories (neurocognitive, autonomic, gastrointestinal, respiratory, musculoskeletal, anosmia and/or dysgeusia, and other manifestations). The main exposure variable was the type of SARS-CoV-2 variants (i.e. Alpha, Delta, and Omicron), extracted from national surveillance data. The association between the different SARS-CoV-2 variants and PCC as well as PCC symptoms categories was assessed using multivariable logistic regression.

resultsThe proportion of PCC among participants infected during the Alpha, Delta, and Omicron-dominant periods was significantly different and respectively 50%, 50%, and 37%. Participants infected during the Alpha- and Delta-dominant periods had a significantly higher odds of having PCC than those infected during the Omicron-dominant period (OR = 1.61, 95% confidence interval [CI] = 1.33-1.96 and OR = 1.73, 95%CI = 1.54-1.93, respectively). Participants infected during the Alpha and Delta-dominant periods were more likely to report neurocognitive, respiratory, and anosmia/dysgeusia symptoms of PCC.

conclusionsPeople infected during the Alpha- and Delta-dominant periods had a higher probability of having PCC three months after infection than those infected during the Omicron-dominant period. The lower probability of PCC with the Omicron variant must also be interpreted in absolute figures. Indeed, the number of infections with the Omicron variant being higher than with the Alpha and Delta variants, it is possible that the overall prevalence of PCC in the population increases, even if the probability of having a PCC decreases.

Indexed as

COVID-19SARS-CoV-2AdultAnosmiaBelgiumCohort StudiesDysgeusiaHumansLongitudinal StudiesLong COVIDpost-COVID-19 conditionSARS-CoV-2 variants

Identifiers

PMID37940843
PMCPMC10634063
OpenAlexW4388488106

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.