Evidence map›Paper›PMID 37989490›Full record

ArticleBMJ open respiratory research2023

Isolated small airways obstruction predicts future chronic airflow obstruction: a multinational longitudinal study.

Ben Knox-Brown, James Potts, Valentina Quintero Santofimio, Cosetta Minelli, Jaymini Patel, Najlaa Mohammed Abass, Dhiraj Agarwal, Rana Ahmed, Padukudru Anand Mahesh, Jayaraj Bs and 13 more

Open access · goldAbstract read
In one paragraph

Article in BMJ open respiratory research, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed, 2 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

18 citing papers in PubMed, 2 syntheses or guidelines pooled it, 16 citations in OpenAlex.

  1. Definitions of early COPD and predictors for disease progression: a systematic review.European respiratory review : an official journal of the European Respiratory Society · 2026
    Pooled it
  2. New spirometry recommendations from the Brazilian Thoracic Association - 2024 update.Jornal brasileiro de pneumologia : publicacao oficial da Sociedade Brasileira de Pneumologia e Tisilogia · 2025
    Guideline
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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

23 authors at 14 institutions in 11 countries.

Ben Knox-BrownNational Heart and Lung Institute, Imperial College London, London, UK b.knox-brown20@imperial.ac.uk.ORCID 0000-0001-5573-4413
James PottsNational Heart and Lung Institute, Imperial College London, London, UK.
Valentina Quintero SantofimioNational Heart and Lung Institute, Imperial College London, London, UK.
Cosetta MinelliNational Heart and Lung Institute, Imperial College London, London, UK.
Jaymini PatelNational Heart and Lung Institute, Imperial College London, London, UK.
Najlaa Mohammed AbassCollege of Medicine, Alshaab Teaching Hospital, Bahri University, Khartoum, Sudan.
Dhiraj AgarwalVadu Rural Health Program, KEM Hospital Pune Research Centre, Pune, India.
Rana AhmedThe Epidemiological Laboratory, Khartoum, Sudan.ORCID 0000-0003-4389-7084
Padukudru Anand MaheshRespiratory Medicine, JSS Medical College, Mysore, Karnataka, India.
Jayaraj BsRespiratory Medicine, JSS Medical College, Mysore, Karnataka, India.
Meriam DenguezliFaculte de Medecine de Sousse, Universite de Sousse, Sousse, Tunisia.
Frits FranssenRespiratory medicine, Maastricht University Medical Centre+, Maastricht, Netherlands.
Thorarinn GislasonDepartment of Sleep, Landspitali University Hospital, Reykjavik, Iceland.
Christer JansonDepartment of Medical Sciences Respiratory, Allergy and Sleep Research, Uppsala University, Uppsala, Sweden.ORCID 0000-0001-5093-6980
Sanjay K JuvekarVadu Rural Health Program, KEM Hospital Pune Research Centre, Pune, India.
Parvaiz KoulSher-i-Kashmir Institute of Medical Sciences, Srinagar, Jammu and Kashmir, India.
Andrei MalinovschiDepartment of Medical Sciences Respiratory, Allergy and Sleep Research, Uppsala University, Uppsala, Sweden.ORCID 0000-0002-4098-7765
Asaad Ahmed NafeesDepartment of Community Health Sciences, The Aga Khan University, Karachi, Sindh, Pakistan.
Rune NielsenDepartment of Thoracic Medicine, University of Bergen, Bergen, Hordaland, Norway.
Stefanni Nonna M ParaguasPhilippine College of Chest Physicians, Quezon City, Philippines.
Sonia BuistOregon Health & Science University, Portland, Oregon, USA.
Peter Gj BurneyNational Heart and Lung Institute, Imperial College London, London, UK.ORCID 0000-0001-8635-5678
Andre F S AmaralNational Heart and Lung Institute, Imperial College London, London, UK.ORCID 0000-0002-0369-9449
Imperial College London · GBDr. D. Y. Patil Medical College, Hospital and Research Centre · INJSS Medical College and Hospital · INUppsala University · SEAga Khan University · PKMaastricht University Medical Centre · NLNIHR Imperial Biomedical Research Centre · GBOregon Health & Science University · USPhilippine Medical Association · PHReykjavík University · ISSher-i-Kashmir Institute of Medical Sciences · INUniversity of Bahri · SDUniversity of Bergen · NOUniversity of Sousse · TN

Funding

Medical Research Council MR/R011192/1Wellcome TrustWellcome Trust 085790/Z/08/Z
6 · The paper itself

Abstract

backgroundChronic airflow obstruction is a key characteristic of chronic obstructive pulmonary disease. We investigated whether isolated small airways obstruction is associated with chronic airflow obstruction later in life.

methodsWe used longitudinal data from 3957 participants of the multinational Burden of Obstructive Lung Disease study. We defined isolated small airways obstruction using the prebronchodilator mean forced expiratory flow rate between 25% and 75% of the forced vital capacity (FVC) (FEF

resultsMedian follow-up time was 8.3 years. Chronic airflow obstruction was more likely to develop in participants with isolated small airways obstruction at baseline (FEF

conclusionMeasurements of small airways obstruction can be used as early markers of future obstructive lung disease.

Indexed as

Airway ObstructionPulmonary Disease, Chronic ObstructiveForced Expiratory VolumeHumansLongitudinal StudiesVital CapacityCOPD epidemiologyLung Physiology

Identifiers

PMID37989490
PMCPMC10660204
OpenAlexW4388871651

What OpenQuestion holds

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LicenceCC BY
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Registered trials

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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.