Evidence map›Paper›PMID 30649434›Full record

ArticleThe Journal of infectious diseases2019

Evidence-Based Study Design for Hospital-Acquired Bacterial Pneumonia and Ventilator-Associated Bacterial Pneumonia.

George H Talbot, Anita Das, Stephanie Cush, Aaron Dane, Michele Wible, Roger Echols, Antoni Torres, Sue Cammarata, John H Rex, John H Powers and 4 more

Abstract read
In one paragraph

Article in The Journal of infectious diseases, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers.

0numbers the graph read from it
0cells of the map it votes in
37citing papers in PubMed
–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

37 citing papers in PubMed.

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  14. Resistance inAntibiotics (Basel, Switzerland) · 2023
    Review
  15. Article
  16. An Adjudication Protocol for Severe Pneumonia.Open forum infectious diseases · 2023
    Article
  17. Article
  18. Review
  19. Article
  20. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

14 authors.

George H TalbotTalbot Advisors LLC, Anna Maria, Florida.
Anita DasADStat, Guerneville, California.
Stephanie CushFoundation for the National Institutes of Health, North Bethesda, Maryland.
Aaron DaneDaneStat, Macclesfield, Cheshire, United Kingdom.
Michele WiblePfizer Inc, Collegeville, Pennsylvania.
Roger EcholsInfectious Disease Drug Development Consulting, LLC, Easton, Connecticut.
Antoni TorresServei de Pneumologia, Hospital Clinic, IDIBAPS, CIBERES, Universitat de Barcelona, Spain.
Sue CammarataMelinta Therapeutics, New Haven, Connecticut.
John H RexF2G Ltd, Eccles, Manchester, United Kingdom.
John H PowersGeorge Washington University School of Medicine, Washington, District of Columbia.
Thomas FlemingUniversity of Washington, Seattle.
Jeffrey LoutitThe Medicines Company, San Diego, California.
Steve HoffmannFoundation for the National Institutes of Health, North Bethesda, Maryland.
Foundation for the National Institutes of Health Biomarkers Consortium HABP/VABP Project Team

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe US Food and Drug Administration solicited evidence-based recommendations to improve guidance for studies of hospital-acquired bacterial pneumonia (HABP) and ventilator-associated bacterial pneumonia (VABP).

methodsWe analyzed 7 HABP/VABP datasets to explore novel noninferiority study endpoints and designs, focusing on alternatives to all-cause mortality (ACM).

resultsACM at day 28 differed for ventilated HABP (27.8%), VABP (18.0%), and nonventilated HABP (14.5%). A "mortality-plus" (ACM+) composite endpoint was constructed by combining ACM with patient-relevant, infection-related adverse events from the Medical Dictionary for Regulatory Activities toxic/septic shock standardized query. The ACM+ rate was 3-10 percentage points above that of ACM across the studies and treatment groups. Predictors of higher ACM/ACM+ rates included older age and elevated acute physiology and chronic health evaluation (APACHE) II score. Only patients in the nonventilated HABP group were able to report pneumonia symptom changes.

conclusionsIf disease groups and patient characteristics in future studies produce an ACM rate so low (<10%-15%) that a fixed noninferiority margin of 10% cannot be justified (requiring an odds ratio analysis), an ACM+ endpoint could lower sample size. Enrichment of studies with patients with a higher severity of illness would increase ACM. Data on symptom resolution in nonventilated HABP support development of a patient-reported outcome instrument.

Indexed as

Research DesignTreatment OutcomeAge FactorsAnti-Bacterial AgentsAPACHEEvidence-Based MedicineFemaleHumansMaleMortalityPneumonia, BacterialPneumonia, Ventilator-AssociatedAnti-Bacterial Agentsall-cause mortalityhospital-acquired bacterial pneumoniamortality-plus endpointventilator-associated bacterial pneumonia

Identifiers

PMID30649434
PMCPMC6562159

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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.