Evidence map›Paper›PMID 27746907›Full record

ArticleF1000Research2016

Whose sample is it anyway? Widespread misannotation of samples in transcriptomics studies.

Lilah Toker, Min Feng, Paul Pavlidis

Abstract read
In one paragraph

Article in F1000Research, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed, 3 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

25 citing papers in PubMed, 3 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Article
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  6. Review
  7. Metadata integrity in bioinformatics: Bridging the gap between data and knowledge.Computational and structural biotechnology journal · 2023
    Review
  8. Article
  9. Article
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  14. Curation of over 10 000 transcriptomic studies to enable data reuse.Database : the journal of biological databases and curation · 2021
    Article
  15. Article
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

3 authors.

Lilah TokerDepartment of Psychiatry, University of British Columbia, Vancouver, V6T 2A1, Canada; Michael Smith Laboratories, University of British Columbia, Vancouver, V6T 1Z4, Canada.
Min FengDepartment of Psychiatry, University of British Columbia, Vancouver, V6T 2A1, Canada; Michael Smith Laboratories, University of British Columbia, Vancouver, V6T 1Z4, Canada; Graduate Program in Genome Sciences and Technology, University of British Columbia, Vancouver, V5Z 4S6, Canada.
Paul PavlidisDepartment of Psychiatry, University of British Columbia, Vancouver, V6T 2A1, Canada; Michael Smith Laboratories, University of British Columbia, Vancouver, V6T 1Z4, Canada.

Funding

Neuroinformatics for gene expression: networks, function and meta-analysisR01GM076990 · NIGMS · UNIVERSITY OF BRITISH COLUMBIA · PI BIROL, INANC, PAVLIDIS, PAUL · 2005 to 2014
$2.0M
NIGMS NIH HHS R01 GM076990
6 · The paper itself

Abstract

Concern about the reproducibility and reliability of biomedical research has been rising. An understudied issue is the prevalence of sample mislabeling, one impact of which would be invalid comparisons. We studied this issue in a corpus of human transcriptomics studies by comparing the provided annotations of sex to the expression levels of sex-specific genes. We identified apparent mislabeled samples in 46% of the datasets studied, yielding a 99% confidence lower-bound estimate for all studies of 33%. In a separate analysis of a set of datasets concerning a single cohort of subjects, 2/4 had mislabeled samples, indicating laboratory mix-ups rather than data recording errors. While the number of mixed-up samples per study was generally small, because our method can only identify a subset of potential mix-ups, our estimate is conservative for the breadth of the problem. Our findings emphasize the need for more stringent sample tracking, and that re-users of published data must be alert to the possibility of annotation and labelling errors.

Indexed as

data qualitygene expressionmisannotationmislabelingreproducibilityTranscriptomics

Identifiers

PMID27746907
PMCPMC5034794

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.