Evidence map›Paper›PMID 33059678›Full record

Observational studyRespiratory research2020

Dyspnea, effort and muscle pain during exercise in lung transplant recipients: an analysis of their association with cardiopulmonary function parameters using machine learning.

Fausto Braccioni, Daniele Bottigliengo, Andrea Ermolao, Marco Schiavon, Monica Loy, Maria Rita Marchi, Dario Gregori, Federico Rea, Andrea Vianello

Open access · goldAbstract readObservational Study
In one paragraph

Observational study in Respiratory research, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed, 1 pooled it
1.6field-weighted citation impact, top 16% 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

14 citing papers in PubMed, 1 synthesis or guideline pooled it, 13 citations in OpenAlex.

  1. Pooled it
  2. Review
  3. Review
  4. Living Life to the Fullest After Organ Transplantation.Transplant international : official journal of the European Society for Organ Transplantation · 2026
    Article
  5. Article
  6. Review
  7. Understanding Machine Learning Applications in Lung Transplantation: A Narrative Review.Transplant international : official journal of the European Society for Organ Transplantation · 2025
    Review
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. 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

9 authors at 1 institution in 1 country.

Fausto BraccioniDivision of Respiratory Pathophysiology, Department of Cardio-Thoracic, Vascular and Public Health Sciences, University Hospital of Padova, Padova, Italy. fausto.braccioni@gmail.com.ORCID http://orcid.org/0000-0002-7197-9821
Daniele BottigliengoDivision of Biostatistics, Epidemiology and Public Health, Department of Cardio-Thoracic, Vascular and Public Health Sciences, University Hospital of Padova, Padova, Italy.
Andrea ErmolaoDivision of Sport and Exercise Medicine, Department of Medicine, University Hospital of Padova, Padova, Italy.
Marco SchiavonDivision of Thoracic Surgery, Department of Cardio-Thoracic, Vascular and Public Health Sciences, University Hospital of Padova, Padova, Italy.
Monica LoyDivision of Thoracic Surgery, Department of Cardio-Thoracic, Vascular and Public Health Sciences, University Hospital of Padova, Padova, Italy.
Maria Rita MarchiDivision of Respiratory Pathophysiology, Department of Cardio-Thoracic, Vascular and Public Health Sciences, University Hospital of Padova, Padova, Italy.
Dario GregoriDivision of Biostatistics, Epidemiology and Public Health, Department of Cardio-Thoracic, Vascular and Public Health Sciences, University Hospital of Padova, Padova, Italy.
Federico ReaDivision of Thoracic Surgery, Department of Cardio-Thoracic, Vascular and Public Health Sciences, University Hospital of Padova, Padova, Italy.
Andrea VianelloDivision of Respiratory Pathophysiology, Department of Cardio-Thoracic, Vascular and Public Health Sciences, University Hospital of Padova, Padova, Italy.
University of Padua · IT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundDespite improvement in lung function, most lung transplant (LTx) recipients show an unexpectedly reduced exercise capacity that could be explained by persisting peripheral muscle dysfunction of multifactorial origin. We analyzed the course of symptoms, including dyspnea, muscle effort and muscle pain and its relation with cardiac and pulmonary function parameters during an incremental exercise testing.

methodsTwenty-four bilateral LTx recipients were evaluated in an observational cross-sectional study. Recruited patients underwent incremental cardio-pulmonary exercise testing (CPET). Arterial blood gases at rest and peak exercise were measured. Dyspnea, muscle effort and muscle pain were scored according to the Borg modified scale. Potential associations between the severity of symptoms and exercise testing parameters were analyzed using a Forest-Tree Machine Learning approach, which accomplishes for a ratio between number of observations and number of screened variables less than unit.

resultsDyspnea score was significantly associated with maximum power output (WR, watts), and minute ventilation (VE, L/min) at peak exercise. In a controlled subgroup analysis, dyspnea score was a limiting symptom only in LTx recipients who reached the higher levels of WR (≥ 101 watts) and V

conclusionsThe majority of our LTx recipients reported peripheral limitation as the prevalent reason for exercise termination. Muscle pain at peak exercise was strictly associated with basal and exercise-induced metabolic altered pathways. The onset of dyspnea (breathing effort) was associated with the intensity of ventilatory response to meet metabolic demands for increasing WR. Our study suggests that only an accurate assessment of symptoms combined with cardio-pulmonary parameters allows a correct interpretation of exercise limitation and a tailored exercise prescription. The role and mechanisms of muscle pain during exercise in LTx recipients requires further investigations.

Indexed as

Machine LearningTransplant RecipientsAdultCross-Sectional StudiesDyspneaExerciseExercise TestExercise ToleranceFemaleHumansLung TransplantationMaleMiddle AgedMyalgiaProspective StudiesArterial blood gasesBorg scaleCardiopulmonary functionExercise testingLung transplantationMuscle pain

Identifiers

PMID33059678
PMCPMC7559436
OpenAlexW3092990902

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.