Evidence map›Paper›PMID 26699917›Full record

Trial reportIntensive care medicine2016

Ventilator-associated pneumonia in ARDS patients: the impact of prone positioning. A secondary analysis of the PROSEVA trial.

L Ayzac, R Girard, L Baboi, P Beuret, M Rabilloud, J C Richard, C Guérin

Abstract readMulticenter StudyRandomized Controlled Trial
PubMed Publisher
In one paragraph

Trial report in Intensive care medicine, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 42 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
42citing papers in PubMed, 3 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

42 citing papers in PubMed, 3 syntheses or guidelines pooled it.

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  3. Prone position for acute respiratory failure in adults.The Cochrane database of systematic reviews · 2015
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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

7 authors.

L AyzacCentre de Coordination et de Lutte Contre les Infections Nosocomiales Sud-Est, Saint Genis Laval, France.
R GirardHospices Civils de Lyon, Service d'Hygiène, Groupement Hospitalier Sud, Pierre Bénite, France.
L BaboiHospices Civils de Lyon, Service de Réanimation Médicale, Groupement Hospitalier Nord, Grande Rue de la Croix-rousse, 69004, Lyon, France.
P BeuretService de Réanimation Polyvalente, Centre Hospitalier Général, Roanne, France.
M RabilloudHospices Civils de Lyon, Service de Biostatistique, 69003, Lyon, France.
J C RichardHospices Civils de Lyon, Service de Réanimation Médicale, Groupement Hospitalier Nord, Grande Rue de la Croix-rousse, 69004, Lyon, France.
C GuérinHospices Civils de Lyon, Service de Réanimation Médicale, Groupement Hospitalier Nord, Grande Rue de la Croix-rousse, 69004, Lyon, France. claude.guerin@chu-lyon.fr.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe goal of this study was to assess the impact of prone positioning on the incidence of ventilator-associated pneumonia (VAP) and the role of VAP in mortality in a recent multicenter trial performed on patients with severe ARDS.

methodsAn ancillary study of a prospective multicenter randomized controlled trial on early prone positioning in patients with severe ARDS. In suspected cases of VAP the diagnosis was based on positive quantitative cultures of bronchoalveolar lavage fluid or tracheal aspirate at the 10(4) and 10(7) CFU/ml thresholds, respectively. The VAP cases were then subject to central, independent adjudication. The cumulative probabilities of VAP were estimated in each position group using the Aalen-Johansen estimator and compared using Gray's test. A univariate and a multivariate Cox model was performed to assess the impact of VAP, used as a time-dependent covariate for mortality hazard during the ICU stay.

resultsIn the supine and prone position groups, the incidence rate for VAP was 1.18 (0.86-1.60) and 1.54 (1.15-2.02) per 100 days of invasive mechanical ventilation (p = 0.10), respectively. The cumulative probability of VAP at 90 days was estimated at 46.5 % (27-66) in the prone group and at 33.5 % (23-44) in the supine group. The difference between the two cumulative probability curves was not statistically significant (p = 0.11). In the univariate Cox model, VAP was associated with an increase in the mortality rate during the ICU stay [HR 1.65 (1.05-2.61), p = 0.03]. HR increased to 2.2 (1.39-3.52) (p < 0.001) after adjustment for position group, age, SOFA score, McCabe score, and immunodeficiency.

conclusionsIn severe ARDS patients prone positioning did not reduce the incidence of VAP and VAP was associated with higher mortality.

Indexed as

Prone PositionBronchoalveolar LavageFemaleHumansIncidenceIntensive Care UnitsMaleMiddle AgedPneumonia, Ventilator-AssociatedProbabilityProspective StudiesRespiration, ArtificialRespiratory Distress SyndromeRisk FactorsARDSProne positionVentilator-associated pneumonia

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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.