Evidence map›Paper›PMID 29629526›Full record

ArticleJournal of clinical neurology (Seoul, Korea)2018

Underregistration and Underreporting of Stem Cell Clinical Trials in Neurological Disorders.

Timothy E Lee, Aryun Kim, Mihee Jang, Beomseok Jeon

Abstract read
In one paragraph

Article in Journal of clinical neurology (Seoul, Korea), 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
4citing 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

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

  1. Time to publication for results of clinical trials.The Cochrane database of systematic reviews · 2024
    Pooled it
  2. Review
  3. Article
  4. 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

4 authors.

Timothy E LeeUniversity of South Florida, Morsani College of Medicine, Tampa, FL, USA.
Aryun KimDepartment of Neurology, Seoul National University College of Medicine, Seoul, Korea.
Mihee JangDepartment of Neurology, Seoul National University College of Medicine, Seoul, Korea.
Beomseok JeonDepartments of Neurology and Movement Disorder Center, Neuroscience Research Institute, Seoul National University College of Medicine, Seoul, Korea. brain@snu.ac.kr.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

background and purposeResearch on stem cells (SC) is growing rapidly in neurology, but clinical applications of SC for neurological disorders remain to be proven effective and safe. Human clinical trials need to be registered in registries in order to reduce publication bias and selective reporting.

methodsWe searched three databases-clinicaltrials.gov, the Clinical Research Information System (CRIS), and PubMed-for neurologically relevant SC-based human trials and articles in Korea. The registration of trials, posting and publication of results, and registration of published SC articles were examined.

resultsThere were 17 completed trials registered at clinicaltrials.gov and the CRIS website, with results articles having been published for 5 of them. Our study found 16 publications, of which 1 was a review article, 1 was a protocol article, and 8 contained registered trial information.

conclusionsMany registered SC trials related to neurological disorders are not reported, while many SC-related publications are not registered in a public registry. These results support the presence of biased reporting and publication bias in SC trials related to neurological disorders in Korea.

Indexed as

Koreaneurological disordersregistrationreportingstem cells

Identifiers

PMID29629526
PMCPMC5897206

What OpenQuestion holds

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LicenceCC BY-NC
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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.