Evidence map›Paper›PMID 40082949›Full record

ArticleCritical care (London, England)2025

Impact of comorbidities on management and outcomes of patients weaning from invasive mechanical ventilation: insights from the WEAN SAFE study.

Omid Khazaei, Caoimhe M Laffey, Rionach Sheerin, Bairbre A McNicholas, Tài Pham, Leo Heunks, Giacomo Bellani, Laurent Brochard, Andrew J Simpkin, John G Laffey and 1 more

Abstract read
In one paragraph

Article in Critical care (London, England), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed, 2 pooled it
–field-weighted citation impact
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

11 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
  3. Observational
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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

11 authors.

Omid Khazaei *School of Mathematical and Statistical Sciences, University of Galway, Galway, Ireland.
Caoimhe M Laffey *Department of Anaesthesia and Intensive Care Medicine, School of Medicine, Clinical Sciences Institute, University of Galway, Galway, H91 YR71, Ireland.
Rionach Sheerin *Department of Anaesthesia and Intensive Care Medicine, School of Medicine, Clinical Sciences Institute, University of Galway, Galway, H91 YR71, Ireland.
Bairbre A McNicholasDepartment of Anaesthesia and Intensive Care Medicine, School of Medicine, Clinical Sciences Institute, University of Galway, Galway, H91 YR71, Ireland.
Tài PhamService de médecine intensive-réanimation, AP-HP, Hôpital de Bicêtre, DMU CORREVE, FHU SEPSIS, Groupe de recherche CARMAS, Hôpitaux Universitaires Paris-Saclay, Le Kremlin-Bicêtre, Paris, France.
Leo HeunksDepartment of Intensive Care Medicine, Radboud University Medical Centre, Nijmegan, The Netherlands.
Giacomo BellaniSchool of Medicine and Surgery, University of Trento, Trento, Italy.
Laurent BrochardInterdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada.
Andrew J SimpkinSchool of Mathematical and Statistical Sciences, University of Galway, Galway, Ireland.
John G LaffeyDepartment of Anaesthesia and Intensive Care Medicine, School of Medicine, Clinical Sciences Institute, University of Galway, Galway, H91 YR71, Ireland. jlaffey@universityofgalway.ie.
WEAN SAFE Investigators

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe impact of comorbidities on patients weaning from invasive ventilation is incompletely understood. We wished to understand the impact of the number and type of comorbidities on patients' weaning from invasive mechanical ventilation enrolled in the 'WorldwidE AssessmeNt of Separation of pAtients From ventilatory assistancE (WEAN SAFE) study.

methodsThe study population consisted of patients enrolled in the WEAN SAFE study that commenced the weaning process. We categorized patients by the number of comorbidities (none, 1, 2, or 3 plus), and by specific comorbidity type. The primary outcome was the impact of comorbidities on delayed weaning and failed weaning from invasive MV. Secondary outcomes included the impact of comorbidities on ICU and hospital survival, and decisions to limit life-sustaining interventions.

resultsOf 4523 patients in the study population, 1614 (35.7%) had one comorbidity, 889 (19.7%) had two comorbidities, 432 (9.6%) had three or more comorbidities, while 1562 (34.5%) had no comorbidities. The most frequently occurring comorbid conditions were respiratory (22%) and cardiovascular (11%). Patients with comorbidities were more likely to fail a separation attempt, more likely to receive an extubation attempt, and to require more than 1 extubation attempt. The proportion of patients with failed weaning from invasive MV increased progressively with increasing comorbidities. Neuromuscular comorbidities were associated with increased weaning duration. Weaning failure was increased with respiratory, hepatic, renal, neuromuscular, and immune dysfunction comorbidities. Hospital mortality rates increased progressively from 16% with no comorbidity to 34% with ≥ 3 comorbidities. Each specific comorbidity was independently associated with increased hospital mortality. The presence of comorbidities was associated with decisions to limit life sustaining interventions.

conclusionsMost patients weaning from invasive ventilation have comorbidities, which are associated with higher weaning failure risk and worse outcomes. The adverse impact of comorbidities on the weaning outcomes and of the process are not explained by a less aggressive approach to weaning.

Indexed as

ComorbidityRespiration, ArtificialVentilator WeaningAgedFemaleHospital MortalityHumansIntensive Care UnitsMaleMiddle AgedTreatment OutcomeChronic liver failureChronic renal failureChronic respiratory impairmentComorbiditiesCongestive heart failureDiabetesImmune suppression

Identifiers

PMID40082949
PMCPMC11907859

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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.