Evidence map›Paper›PMID 34862226›Full record

Trial reportClinical medicine (London, England)2021

The unspoken benefit of participation in a clinical trial.

Konstantin Schwarz, Sathish Parasuraman, Satnam Singh, John D Horowitz, Dana K Dawson, Michael P Frenneaux

Abstract readClinical Trial, Phase IIRandomized Controlled Trial
In one paragraph

Trial report in Clinical medicine (London, England), 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.

0numbers the graph read from it
0cells of the map it votes in
8citing 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

8 citing papers in PubMed.

  1. Review
  2. Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. Seeing what others see while thinking what others have not.Clinical medicine (London, England) · 2021
    Article
  8. 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

6 authors.

Konstantin SchwarzKarl Landsteiner University of Health Sciences, Krems, Austria konstantin.schwarz@stpoelten.lknoe.at.
Sathish ParasuramanMusgrove Park Hospital, Taunton, UK.
Satnam SinghFrimley Park Hospital, Frimley, UK.
John D HorowitzAdelaide Medical School, Adelaide, Australia.
Dana K DawsonUniversity of Aberdeen School of Medicine and Dentistry, Aberdeen, UK.
Michael P FrenneauxNorwich Medical School, Norwich, UK and Academic Health System Hamad Medical Corporation, Doha, Qatar.

Funding

Medical Research Council
6 · The paper itself

Abstract

backgroundPublicly funded trials do not usually offer financial incentives to volunteers. An intensive level of medical care could act as an additional motivator for participation. Our aim was to establish whether patients may draw any clinical benefit from volunteering in a clinical trial.

methodsWe analysed the recruitment process of a phase II randomised controlled trial, the Inorganic Nitrate in Angina Study.

resultsTwo-hundred and thirteen patients with a history of stable angina and who had been under at least annual primary care review were screened for participation by history taking, examination, 12-lead electrocardiography, treadmill test and echocardiography. Thirty-five (16.4%) patients were found to have significant unstable or new clinical pathology, requiring urgent clinical attention. We identified 17 (7.9%) patients with unstable angina. Furthermore, we found new undiagnosed pathologies: amyloidosis in two (0.9%), hypertrophic cardiomyopathy in two (0.9%), left ventricular systolic dysfunction (ejection fraction <45%) in three (1.4%), left ventricular thrombus in one (0.4%), significant valvular disease in five (2.4%) and arrhythmias in six (2.8%).

conclusionCompared with routine care, patients screened for a clinical trial may come under an increased level of scrutiny that may affect their clinical management. This may act as additional motivator to attract patients to future studies.

Indexed as

ElectrocardiographyVentricular Dysfunction, LeftEchocardiographyExercise TestHumansStroke Volumeclinical researchrecruitment

Identifiers

PMID34862226
PMCPMC8806284

What OpenQuestion holds

Textmetadata
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.