Evidence map›Paper›PMID 27006248›Full record

ArticleThe Journal of allergy and clinical immunology2016

Relationship between lung function and quantitative computed tomographic parameters of airway remodeling, air trapping, and emphysema in patients with asthma and chronic obstructive pulmonary disease: A single-center study.

Ruth A Hartley, Bethan L Barker, Chris Newby, Mini Pakkal, Simonetta Baldi, Radhika Kajekar, Richard Kay, Marie Laurencin, Richard P Marshall, Ana R Sousa and 4 more

Open access · hybridAbstract read
In one paragraph

Article in The Journal of allergy and clinical immunology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 47 papers.

0numbers the graph read from it
0cells of the map it votes in
47citing papers in PubMed
9.2field-weighted citation impact, top 2% 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

47 citing papers in PubMed, 112 citations in OpenAlex.

  1. Imaging Markers of Chronic Obstructive Pulmonary Disease on Computed Tomography of the Lungs: a Narrative Review.Medical science monitor : international medical journal of experimental and clinical research · 2026
    Review
  2. Article
  3. Article
  4. LAPTM5 potentiates airway remodeling by regulating MAPKs-mediated airway smooth muscle cells' dysfunction.Mammalian genome : official journal of the International Mammalian Genome Society · 2026
    Article
  5. Article
  6. Review
  7. Article
  8. Article
  9. Article
  10. The epithelial era of asthma research: knowledge gaps and future direction for patient care.European respiratory review : an official journal of the European Respiratory Society · 2024
    Review
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  12. Article
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  15. Article
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

14 authors at 4 institutions in 3 countries.

Ruth A HartleyDepartment of Infection, Inflammation and Immunity and Health Sciences, Institute for Lung Health, University of Leicester, Leicester, United Kingdom.
Bethan L BarkerDepartment of Infection, Inflammation and Immunity and Health Sciences, Institute for Lung Health, University of Leicester, Leicester, United Kingdom.
Chris NewbyDepartment of Infection, Inflammation and Immunity and Health Sciences, Institute for Lung Health, University of Leicester, Leicester, United Kingdom.
Mini PakkalDepartment of Infection, Inflammation and Immunity and Health Sciences, Institute for Lung Health, University of Leicester, Leicester, United Kingdom.
Simonetta BaldiDepartment of Infection, Inflammation and Immunity and Health Sciences, Institute for Lung Health, University of Leicester, Leicester, United Kingdom.
Radhika KajekarDepartment of experimental Medicine, Hoffmann-La Roche, Nutley, NJ.
Richard KayNovartis, Basel, Switzerland.
Marie LaurencinNovartis, Basel, Switzerland.
Richard P MarshallGlaxoSmithKline, Stevenage, United Kingdom.
Ana R SousaGlaxoSmithKline, Stevenage, United Kingdom.
Harsukh ParmarDepartment of experimental Medicine, Hoffmann-La Roche, Nutley, NJ.
Salman SiddiquiDepartment of Infection, Inflammation and Immunity and Health Sciences, Institute for Lung Health, University of Leicester, Leicester, United Kingdom.
Sumit GuptaDepartment of Infection, Inflammation and Immunity and Health Sciences, Institute for Lung Health, University of Leicester, Leicester, United Kingdom; Radiology Department, Glenfield Hospital, University Hospitals of Leicester NHS Trust, Leicester, United Kingdom.
Chris E BrightlingDepartment of Infection, Inflammation and Immunity and Health Sciences, Institute for Lung Health, University of Leicester, Leicester, United Kingdom. Electronic address: ceb17@le.ac.uk.
University of Leicester · GBGlaxoSmithKline (United Kingdom) · GBLa Roche College · USNovartis (Switzerland) · CH

Funding

Wellcome Trust
6 · The paper itself

Abstract

backgroundThere is a paucity of studies comparing asthma and chronic obstructive pulmonary disease (COPD) based on thoracic quantitative computed tomographic (QCT) parameters.

objectivesWe sought to compare QCT parameters of airway remodeling, air trapping, and emphysema between asthmatic patients and patients with COPD and explore their relationship with airflow limitation.

methodsAsthmatic patients (n = 171), patients with COPD (n = 81), and healthy subjects (n = 49) recruited from a single center underwent QCT and clinical characterization.

resultsProximal airway percentage wall area (%WA) was significantly increased in asthmatic patients (62.5% [SD, 2.2]) and patients with COPD (62.7% [SD, 2.3]) compared with that in healthy control subjects (60.3% [SD, 2.2], P < .001). Air trapping measured based on mean lung density expiratory/inspiratory ratio was significantly increased in patients with COPD (mean, 0.922 [SD, 0.037]) and asthmatic patients (mean, 0.852 [SD, 0.061]) compared with that in healthy subjects (mean, 0.816 [SD, 0.066], P < .001). Emphysema assessed based on lung density measured by using Hounsfield units below which 15% of the voxels lie (Perc15) was a feature of COPD only (patients with COPD: mean, -964 [SD, 19.62] vs asthmatic patients: mean, -937 [SD, 22.7] and healthy subjects: mean, -937 [SD, 17.1], P < .001). Multiple regression analyses showed that the strongest predictor of lung function impairment in asthmatic patients was %WA, whereas in the COPD and asthma subgrouped with postbronchodilator FEV1 percent predicted value of less than 80%, it was air trapping. Factor analysis of QCT parameters in asthmatic patients and patients with COPD combined determined 3 components, with %WA, air trapping, and Perc15 values being the highest loading factors. Cluster analysis identified 3 clusters with mild, moderate, or severe lung function impairment with corresponding decreased lung density (Perc15 values) and increased air trapping.

conclusionsIn asthmatic patients and patients with COPD, lung function impairment is strongly associated with air trapping, with a contribution from proximal airway narrowing in asthmatic patients.

Indexed as

Airway RemodelingAsthmaPulmonary Disease, Chronic ObstructivePulmonary EmphysemaAdultAgedFemaleForced Expiratory VolumeHumansMaleMiddle AgedTomography, X-Ray Computedairway remodelingAsthmaasthma-COPD overlap syndromechronic obstructive pulmonary diseaseemphysemagas trappingquantitative computed tomographysmall airway disease

Identifiers

PMID27006248
PMCPMC4852952
OpenAlexW2299831004

What OpenQuestion holds

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LicenceCC BY
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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.