Evidence map›Paper›PMID 35753603›Full record

ArticleInternational journal of infectious diseases : IJID : official publication of the International Society for Infectious Diseases2022

Prevalence of long COVID in a national cohort: longitudinal measures from disease onset until 8 months' follow-up.

Maria Skaalum Petersen, Marnar Fríðheim Kristiansen, Katrin Dahl Hanusson, Billa Mouritsardóttir Foldbo, Marjun Eivindardóttir Danielsen, Bjarni Á Steig, Shahin Gaini, Marin Strøm, Pál Weihe

Open access · goldAbstract read
In one paragraph

Article in International journal of infectious diseases : IJID : official publication of the International Society for Infectious Diseases, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed, 3 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

22 citing papers in PubMed, 3 syntheses or guidelines pooled it, 33 citations in OpenAlex.

  1. Global prevalence of post-COVID-19 condition: a systematic review and meta-analysis of prospective evidence.Health promotion and chronic disease prevention in Canada : research, policy and practice · 2025
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  17. Dynamics of the Microbiota and Its Relationship with Post-COVID-19 Syndrome.International journal of molecular sciences · 2023
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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

9 authors at 2 institutions in 2 countries.

Maria Skaalum PetersenCenter of Health Sciences, University of the Faroe Islands, Vestara Bryggja 15, Tórshavn, Faroe Islands; Department of Occupational Medicine and Public Health, The Faroese Hospital System, Sigmundargøta 5, Tórshavn, Faroe Islands. Electronic address: maria@health.fo.
Marnar Fríðheim KristiansenCenter of Health Sciences, University of the Faroe Islands, Vestara Bryggja 15, Tórshavn, Faroe Islands; Medical Department, National Hospital of the Faroe Islands, J.C. Svabosgøta 41-49, Tórshavn, Faroe Islands.
Katrin Dahl HanussonDepartment of Occupational Medicine and Public Health, The Faroese Hospital System, Sigmundargøta 5, Tórshavn, Faroe Islands.
Billa Mouritsardóttir FoldboDepartment of Occupational Medicine and Public Health, The Faroese Hospital System, Sigmundargøta 5, Tórshavn, Faroe Islands.
Marjun Eivindardóttir DanielsenDepartment of Occupational Medicine and Public Health, The Faroese Hospital System, Sigmundargøta 5, Tórshavn, Faroe Islands.
Bjarni Á SteigMedical Department, National Hospital of the Faroe Islands, J.C. Svabosgøta 41-49, Tórshavn, Faroe Islands.
Shahin GainiCenter of Health Sciences, University of the Faroe Islands, Vestara Bryggja 15, Tórshavn, Faroe Islands; Medical Department, National Hospital of the Faroe Islands, J.C. Svabosgøta 41-49, Tórshavn, Faroe Islands; Department of Infectious Diseases, Odense University Hospital, J.B. Winsløwsvej 4, Odense, Denmark; Department of Clinical Research, University of Southern Denmark, Winsløwparken 19, Odense, Denmark.
Marin StrømCenter of Health Sciences, University of the Faroe Islands, Vestara Bryggja 15, Tórshavn, Faroe Islands; Department of Epidemiology Research, Statens Serum Institut, Artillerivej 5, Copenhagen S, Denmark.
Pál WeiheCenter of Health Sciences, University of the Faroe Islands, Vestara Bryggja 15, Tórshavn, Faroe Islands; Department of Occupational Medicine and Public Health, The Faroese Hospital System, Sigmundargøta 5, Tórshavn, Faroe Islands.
University of the Faroe Islands · FOStatens Serum Institut · DK

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesPersistence of COVID-19 symptoms in nonhospitalized individuals beyond a few months has not been well characterized. In this longitudinal study from the Faroe Islands, we present prevalence of long COVID in mainly nonhospitalized patients who were followed up for up to 8 months.

methodsAll Faroese individuals with confirmed COVID-19 diagnosis from August to December 2020 were invited to participate in this study (n = 297). Demographic and clinical characteristics and self-reported symptoms were ascertained prospectively using a detailed questionnaire administered at repeated phone interviews.

resultsA total of 226 individuals participated at baseline (226/297, 76% participation rate), of whom 170 participants had more than 3 months follow-up. Of these, 39% (n = 67/170, 95% confidence interval [CI] 32-37%) reported persistent symptoms (median [range] 168 [93-231] days) after the acute phase and 8% (n = 14/170, 95% CI 5-13%) reported severe persistent symptoms. The most prevalent symptoms were fatigue (17%) and smell (17%) and taste (14%) dysfunction. Long COVID was more common in people reporting daily medication use (odds ratio 2.34, 95% CI 1.02-5.37).

conclusionOur results show that symptoms may take months to resolve, even among nonhospitalized individuals, with a mild illness in the acute phase. Continued monitoring for long COVID is needed to evaluate the added risk of a potential public health concern.

Indexed as

COVID-19COVID-19 TestingFollow-Up StudiesHumansLongitudinal StudiesPost-Acute COVID-19 SyndromePrevalenceSARS-CoV-2COVID-19Faroe IslandsLong COVIDLongitudinal studyPersisting symptoms

Identifiers

PMID35753603
PMCPMC9222150
OpenAlexW4283368057

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.