Evidence map›Paper›PMID 33284499›Full record

ArticleClinical physiology and functional imaging2021

The ratio FEV

Kjell Torén, Linus Schiöler, Anne Lindberg, Anders Andersson, Annelie F Behndig, Göran Bergström, Anders Blomberg, Kenneth Caidahl, Jan E Engvall, Maria J Eriksson and 14 more

Open access · hybridAbstract read
In one paragraph

Article in Clinical physiology and functional imaging, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed
1.0field-weighted citation impact, top 19% 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, 26 citations in OpenAlex.

  1. Trial
  2. Article
  3. Article
  4. Article
  5. Predicting VOSports medicine (Auckland, N.Z.) · 2025
    Article
  6. Risk Factors of FEV₁/FVC Decline in COPD Patients.Journal of Korean medical science · 2025
    Observational
  7. Article
  8. Article
  9. Article
  10. Article
  11. The ratio FEVClinical physiology and functional imaging · 2021
    Article
  12. Quest for Biomarkers of Positive Health: A Review.Indian journal of community medicine : official publication of Indian Association of Preventive & Social Medicine
    Review
  13. 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

24 authors at 8 institutions in 1 country.

Kjell TorénOccupational and Environmental Medicine, School of Public Health and Community Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.ORCID https://orcid.org/0000-0001-8509-7603
Linus SchiölerOccupational and Environmental Medicine, School of Public Health and Community Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
Anne LindbergDepartment of Public Health and Clinical Medicine, Section of Medicine, Umeå University, Umeå, Sweden.
Anders AnderssonCOPD Center, Department or Respiratory Medicine and Allergology, Sahlgrenska University Hospital, Gothenburg, Sweden.
Annelie F BehndigDepartment of Public Health and Clinical Medicine, Section of Medicine, Umeå University, Umeå, Sweden.
Göran BergströmDepartment of Molecular and Clinical Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
Anders BlombergDepartment of Public Health and Clinical Medicine, Section of Medicine, Umeå University, Umeå, Sweden.
Kenneth CaidahlDepartment of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden.
Jan E EngvallCMIV, Centre of Medical Image Science and Visualization, Linkoping University, Linkoping, Sweden.ORCID https://orcid.org/0000-0002-5716-5098
Maria J ErikssonDepartment of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden.
Viktor HamreforsDepartment of Clinical Sciences, Lund University, Malmö, Sweden.
Christer JansonDepartment of Medical Sciences, Respiratory-, Allergy- and Sleep Research, Uppsala University, Uppsala, Sweden.
David KylhammarDepartment of Clinical Physiology, Linköping University, Linköping, Sweden.
Eva LindbergDepartment of Medical Sciences, Respiratory-, Allergy- and Sleep Research, Uppsala University, Uppsala, Sweden.
Anders LindénUnit for Lung & Airway Research, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.
Andrei MalinovschiDepartment of Medical Sciences, Clinical Physiology, Uppsala University, Uppsala, Sweden.
Hans Lennart PerssonDepartment of Clinical Physiology, Linköping University, Linköping, Sweden.
Martin SandelinDepartment of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden.
Jonas Eriksson StrömDepartment of Public Health and Clinical Medicine, Section of Medicine, Umeå University, Umeå, Sweden.
Hanan TanashDepartment of Clinical Science in Malmö, Lund University, Lund, Sweden.
Jenny VikgrenDepartment of Radiology, Sahlgrenska University Hospital and the Sahlgrenska Academy at Gothenburg University, Gothenburg, Sweden.
Carl Johan ÖstgrenDepartment of Medical and Health Sciences, Linköping University, Linköping, Sweden.
Per WollmerDepartment of Translational Medicine, Lund University, Malmö, Sweden.
C Magnus SköldDepartment of Respiratory Medicine and Allergy, Karolinska University Hospital Solna, Stockholm, Sweden.
Linköping University · SEUmeå University · SEUppsala University · SEKarolinska University Hospital · SELund University · SESahlgrenska University Hospital · SEUniversity of Gothenburg · SEKarolinska Institutet · SE

Funding

Forskningsrådet om Hälsa, Arbetsliv och VälfärdHjärt-LungfondenKnut och Alice Wallenbergs StiftelseSwedish State ALF AgreementVetenskapsrådetVINNOVA
6 · The paper itself

Abstract

Chronic airflow limitation (CAL) can be defined as fixed ratio of forced expiratory volume in 1 s (FEV

Indexed as

Cross-Sectional StudiesAdultChildForced Expiratory VolumeHumansProspective StudiesSwedenVital Capacitychronic airflow limitationCOPDcough with phlegmdyspnoeaGOLDSCAPISwheeze

Identifiers

PMID33284499
PMCPMC7898324
OpenAlexW3112753625

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.