Evidence map›Paper›PMID 34979029›Full record

ArticleThe Journal of infectious diseases2022

Lung Function Decline in Relation to COVID-19 in the General Population: A Matched Cohort Study With Prepandemic Assessment of Lung Function.

Katrine K Iversen, Shoaib Afzal, Magnus G Ahlström, Børge G Nordestgaard, Uffe V Schneider, Lene Nielsen, Klaus Kofoed, Thomas Benfield, Andreas Ronit

Open access · bronzeAbstract read
In one paragraph

Article in The Journal of infectious diseases, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed, 2 pooled it
3.2field-weighted citation impact, top 7% 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

13 citing papers in PubMed, 2 syntheses or guidelines pooled it, 23 citations in OpenAlex.

  1. Recovery of lung function during the first year after COVID-19: a systematic review and meta-analysis.European respiratory review : an official journal of the European Respiratory Society · 2025
    Pooled it
  2. Pooled it
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  4. Lung Function Impairment after Mild SARS-CoV-2 Infection in Previously Healthy Individuals.Respiration; international review of thoracic diseases · 2026
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

9 authors at 4 institutions in 1 country.

Katrine K IversenDepartment of Infectious Diseases 144, Copenhagen University Hospital-Amager Hvidovre, Hvidovre, Denmark.
Shoaib AfzalDepartment of Clinical Biochemistry, Copenhagen University Hospital-Herlev and Gentofte, Herlev, Denmark.ORCID 0000-0002-1442-4694
Magnus G AhlströmDepartment of Clinical Microbiology, Copenhagen University Hospital-Rigshospitalet, Copenhagen, Denmark.
Børge G NordestgaardDepartment of Clinical Biochemistry, Copenhagen University Hospital-Herlev and Gentofte, Herlev, Denmark.
Uffe V SchneiderDepartment of Clinical Microbiology, Copenhagen University Hospital-Amager Hvidovre, Hvidovre, Denmark.
Lene NielsenDepartment of Clinical Microbiology, Copenhagen University Hospital-Herlev and Gentofte, Herlev, Denmark.
Klaus KofoedDepartment of Cardiology, Copenhagen University Hospital-Rigshospitalet, Copenhagen, Denmark.
Thomas BenfieldDepartment of Infectious Diseases 144, Copenhagen University Hospital-Amager Hvidovre, Hvidovre, Denmark.
Andreas RonitDepartment of Infectious Diseases 144, Copenhagen University Hospital-Amager Hvidovre, Hvidovre, Denmark.ORCID 0000-0002-8960-7524
Hvidovre Hospital · DKCopenhagen University Hospital · DKUniversity of Copenhagen · DKGentofte Hospital · DK

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundTo quantify the potential decline in dynamic lung volumes following coronavirus disease 2019 (COVID-19) in the general population.

methodsA prospective matched cohort study of adult Copenhagen General Population Study (CGPS) participants with a prepandemic spirometry available. CGPS individuals with positive severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) polymerase chain reaction (PCR) test performed repeat spirometry, a questionnaire regarding respiratory symptoms, and diffusing capacity test for carbon monoxide. A matched uninfected CGPS control sample was used, and simple regression and linear mixed effect models were computed to study lung function decline.

resultsA total of 606 individuals were included; 92/107 (85.9%) with positive SARS-CoV-2 PCR test experienced coronavirus disease 2019 (COVID-19) symptoms and 12 (11.2%) were hospitalized. Spirometry was performed at median 5.6 months (interquartile range, 3.9-12.8) after positive SARS-CoV-2 PCR test. COVID-19 was associated with adjusted 7.3 mL (95% confidence interval [CI], .3-14.3) and 22.6 mL (95% CI, 13.1-32.0) steeper decline in annual forced expiratory volume in first second (FEV1) and FVC or total 113.8 and 301.3 mL lower FEV1 and FVC from baseline to follow-up. Results were robust in analyses restricted to individuals not requiring hospitalization.

conclusionsCOVID-19-related declines of dynamic lung volume in the general population not requiring hospitalization were small but measurable.

Indexed as

COVID-19AdultCohort StudiesHumansLungProspective StudiesSARS-CoV-2Vital Capacitycoronavirus disease 2019forced expiratory volume in 1 secondforced vital capacityrespiratory symptomssevere acute respiratory syndrome coronavirus 2spirometry

Identifiers

PMID34979029
PMCPMC8755346
OpenAlexW4205266520

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.