Evidence map›Paper›PMID 29202730›Full record

Trial reportBMC neurology2017

Selection bias in clinical stroke trials depending on ability to consent.

Benjamin Hotter, Lena Ulm, Sarah Hoffmann, Mira Katan, Joan Montaner, Alejandro Bustamante, Andreas Meisel

2 registry-linked trialsAbstract readMulticenter StudyRandomized Controlled Trial
In one paragraph

Trial report in BMC neurology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to 2 registered trials, which are not on this map. Cited by 14 papers.

0numbers the graph read from it
0cells of the map it votes in
14citing 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.

NCT01264549 nacompletednot on this map

Stroke Adverse Outcome is Associated With Nosocomial Infections: PCTus- Guided Antibacterial Therapy in Severe Ischemic Stroke Patients

TypeinterventionalSponsorCharite University, Berlin, GermanyRan2010 to 2014Enrolled230ConditionsIschemic StrokeArmsProcalcitonin assay - B.R.A.H.M.S PCT ultrasensitive Kryptor
NCT07553650 not yet recruitingnot on this mapstarted 2026, after this paper: background citation

Master Study Protocol for the Cohort of the Specialist Network Stroke (SN Stroke) (Stroke-CORE)

Typeobservational_patient_registrySponsorCharite University, Berlin, GermanyRan2026 to 2030Enrolled12,750ConditionsIntracerebral Haemorrhage, Paediatric Stroke, Stroke Acute, Stroke
3 · Its place in the literature

Who cites it

14 citing papers in PubMed.

  1. The effect of repeated remote ischemic postconditioning after an ischemic stroke (REPOST): A randomized controlled trial.International journal of stroke : official journal of the International Stroke Society · 2023
    Trial
  2. Review
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  8. A scoping review of the use of visual tools and adapted easy-read approaches in Quality-of-Life instruments for adults.Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation · 2023
    Article
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  11. Review
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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.

Benjamin HotterCenter for Stroke Research Berlin, Charité University Hospital Berlin, Charitéplatz 1, 10115, Berlin, Germany. benjamin.hotter@charite.de.ORCID http://orcid.org/0000-0002-5272-9181
Lena UlmCenter for Stroke Research Berlin, Charité University Hospital Berlin, Charitéplatz 1, 10115, Berlin, Germany.
Sarah HoffmannCenter for Stroke Research Berlin, Charité University Hospital Berlin, Charitéplatz 1, 10115, Berlin, Germany.
Mira KatanDepartment of Neurology, University Hospital Zurich, Frauenklinikstrasse 26, 8091, Zurich, Switzerland.
Joan MontanerNeurovascular Research Laboratory, Vall d'Hebron Institut de Recerca, Passeig Vall d'Hebron 119-129, 08035, Barcelona, Spain.
Alejandro BustamanteNeurovascular Research Laboratory, Vall d'Hebron Institut de Recerca, Passeig Vall d'Hebron 119-129, 08035, Barcelona, Spain.
Andreas MeiselCenter for Stroke Research Berlin, Charité University Hospital Berlin, Charitéplatz 1, 10115, Berlin, Germany.

Funding

Bundesministerium für Bildung und Forschung (DE) 01EO0801Deutsche Forschungsgemeinschaft Exc257, TR84, UL423/1-1FP7 Health 201024 and 202213Thermo Fischer Scientific BRAHMS GmbH (DE) N/A
6 · The paper itself

Abstract

backgroundClinical trials are the hallmark of evidence-based medicine, but recruitment is often challenging, especially in stroke trials investigating patients not being able to give informed consent. In some nations, ethics committees will not approve of inclusion in a clinical study via consent of a legal representative. The ethical dilemma of including or excluding those patients has not been properly addressed, as there is little data on the effect of stroke characteristics on the ability to give informed consent.

methodsTo examine differences between patients able and unable to consent at inclusion to an acute stroke trial, we conducted a post-hoc analysis of monitoring records from a multicentric interventional trial. These records listed patients who gave informed consent by themselves and those who needed a legal representative to do so. This exemplary STRAWINSKI trial aimed at improving stroke outcome by biomarker-guided antibiotic treatment of stroke associated pneumonia and included patients within 40 h after stroke onset, suffering from MCA infarctions with an NIHSS score > 9 at admission. Standard descriptive and associative statistics were calculated to compare baseline characteristics and outcome measures between patients who were able to consent and those who were not.

resultsWe identified the person giving consent in 228 out of 229 subjects. Patients with inability to consent were older (p < 0.01), suffered from more left-hemispheric (p < 0.01) and more severe strokes (NIHSS, p < 0.01), were more likely to die during hospitalisation (p < 0.01) or have unfavourable outcome at discharge (mRS, p < 0.01), to develop fever (p < 0.01) and tended to be more susceptible to infections (p = 0.06) during the acute course of the disorder.

conclusionsDemographics, stroke characteristics and outcomes significantly affect stroke patients in their ability to consent. Where selection criteria and primary outcome measures of a trial are significantly affected by ability to consent, excluding patients unable to consent might be unethical.

trial registrationURL http://www.clinicaltrials.gov . Unique identifier: NCT01264549 .

Indexed as

Informed ConsentPatient SelectionSelection BiasAgedAged, 80 and overEvidence-Based MedicineFemaleHumansMaleMiddle AgedResearch DesignStrokeClinical trialEthicsInformed consentMethodsSelection biasStroke

Identifiers

PMID29202730
PMCPMC5716230

What OpenQuestion holds

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Registered trials

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.