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Related Experiment Video

Updated: Oct 15, 2025

Author Spotlight: Biological Standardization to Ensure Reproducibility and Harmonization in Research
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Charting the course from abstract to published article.

David R Hallan1, Alyssa M Nguyen2, Menglu Liang3

  • 11Department of Neurosurgery, Pennsylvania State University College of Medicine, Hershey.

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|October 29, 2021
PubMed
Summary
This summary is machine-generated.

Scientific abstracts are often unreliable; nearly half are unpublished, and many published papers differ from their original abstract. Positive results show publication bias, appearing more frequently in journals.

Keywords:
American Association of Neurological Surgeonsabstractannual meetingnational meetingneurosurgeryoral presentationposterpublication outcomesscientific meeting

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Area of Science:

  • Neurological Surgery
  • Scientific Publishing
  • Medical Research Dissemination

Background:

  • Abstracts provide concise scientific information but may lack the reliability of full publications.
  • The brevity of abstracts can obscure the full context and potential limitations of research findings.

Purpose of the Study:

  • To evaluate the publication rate of abstracts presented at the American Association of Neurological Surgeons (AANS) annual meeting.
  • To investigate publication bias and result discrepancies between AANS abstracts and their full-text publications.
  • To assess the scientific reliability of abstracts as standalone sources of information.

Main Methods:

  • Screening of all abstracts from the 2012 AANS annual meeting.
  • Identification of corresponding peer-reviewed publications via PubMed/MEDLINE.
  • Analysis of abstracts and publications for result type (positive/negative) and consistency.

Main Results:

  • 49.3% of abstracts were published in peer-reviewed journals.
  • 18.1% of published papers presented messages differing from their original abstracts.
  • Positive abstracts were 40% more likely to be published than negative abstracts, indicating publication bias.

Conclusions:

  • Abstracts alone are not reliable indicators of scientific findings due to low publication rates and result discrepancies.
  • Unpublished abstracts do not undergo sufficient scientific scrutiny to inform clinical practice.
  • Publication bias favors positive results, potentially skewing the scientific record.