Evidence map›Paper›PMID 30373636›Full record

ArticleTrials2018

Outcomes, Interventions and Funding in Randomised Research Published in High-Impact Journals.

Patrick Grey, Andrew Grey, Mark J Bolland

Abstract readComparative Study
In one paragraph

Article in Trials, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed, 1 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

8 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Article
  3. Article
  4. Review
  5. Article
  6. Article
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  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

3 authors.

Patrick GreyDepartment of Medicine, University of Auckland, Private Bag 92024, Auckland, New Zealand.
Andrew GreyDepartment of Medicine, University of Auckland, Private Bag 92024, Auckland, New Zealand. a.grey@auckland.ac.nz.ORCID http://orcid.org/0000-0002-7803-0096
Mark J BollandDepartment of Medicine, University of Auckland, Private Bag 92024, Auckland, New Zealand.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundRandomised clinical trials are pivotal in guiding clinical practice. Trials with surrogate outcomes and industry sponsorship might be less reliable than those with hard outcomes and independent sponsorship. The types of interventions evaluated in randomised clinical trials might not reflect the diversity of those employed in clinical practice.

methodsWe assessed the types of primary outcome, types of intervention and sponsorship of 360 randomised clinical trials evaluating 416 interventions, published in seven major general medical journals and 10 speciality medical journals in five clinical disciplines.

resultsPrimary outcomes were surrogate in 223/360 (62%) trials. Neither type of journal nor source of sponsorship was associated with type of primary outcome. Among the interventions evaluated, 233/416 (56%) were drugs, 17/416 (4%) devices and 49/416 (12%) procedures. The majority of trials were non-industry funded (220/360, 61%). Trials of drug interventions and those with industry sponsorship were more common in specialty than general journals (68% vs 48% and 55% vs 25%, respectively). Industry sponsorship was not associated with results for the primary outcome but was strongly associated with trials of drugs and devices. Within the groups of both general and speciality journals, there were wide ranges in the prevalence of industry funding (7-63% and 37-70%, respectively), but in all cases the prevalence of hard primary outcomes was <40%.

conclusionsMost randomised clinical trials published in influential journals reported surrogate primary outcomes and assessed drug interventions. Trials that evaluated devices and procedures were infrequently published, despite the prominence of each type of intervention in clinical practice. Industry funding was more common for trials published in specialty than general journals but was not associated with more positive results for primary outcomes or with a greater preponderance of surrogate outcomes.

Indexed as

Endpoint DeterminationJournal Impact FactorPeriodicals as TopicResearch DesignResearch Support as TopicConflict of InterestDrug IndustryHealth Care SectorHumansRandomized Controlled Trials as TopicTreatment OutcomeInterventionsOutcomesRandomised clinical trialsSponsorshipSurrogate

Identifiers

PMID30373636
PMCPMC6206943

What OpenQuestion holds

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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.