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Systematic Reviews of Animal Studies; Missing Link in Translational Research?

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  • Judith van Luijk
  • Brenda Bakker
  • Maroeska M Rovers
  • Merel Ritskes-Hoitinga
  • Rob B M de Vries
  • Marlies Leenaars

Abstract

Background: The methodological quality of animal studies is an important factor hampering the translation of results from animal studies to a clinical setting. Systematic reviews of animal studies may provide a suitable method to assess and thereby improve their methodological quality. Objectives: The aims of this study were: 1) to evaluate the risk of bias assessment in animal-based systematic reviews, and 2) to study the internal validity of the primary animal studies included in these systematic reviews. Data Sources: We systematically searched Pubmed and Embase for SRs of preclinical animal studies published between 2005 and 2012. Results: A total of 91 systematic reviews met our inclusion criteria. The risk of bias was assessed in 48 (52.7%) of these 91 systematic reviews. Thirty-three (36.3%) SRs provided sufficient information to evaluate the internal validity of the included studies. Of the evaluated primary studies, 24.6% was randomized, 14.6% reported blinding of the investigator/caretaker, 23.9% blinded the outcome assessment, and 23.1% reported drop-outs. Conclusions: To improve the translation of animal data to clinical practice, systematic reviews of animal studies are worthwhile, but the internal validity of primary animal studies needs to be improved. Furthermore, risk of bias should be assessed by systematic reviews of animal studies to provide insight into the reliability of the available evidence.

Suggested Citation

  • Judith van Luijk & Brenda Bakker & Maroeska M Rovers & Merel Ritskes-Hoitinga & Rob B M de Vries & Marlies Leenaars, 2014. "Systematic Reviews of Animal Studies; Missing Link in Translational Research?," PLOS ONE, Public Library of Science, vol. 9(3), pages 1-5, March.
    • Handle: RePEc:plo:pone00:0089981
    DOI: 10.1371/journal.pone.0089981
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    References listed on IDEAS

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    1. C R Hooijmans & M Ritskes-Hoitinga, 2013. "Progress in Using Systematic Reviews of Animal Studies to Improve Translational Research," PLOS Medicine, Public Library of Science, vol. 10(7), pages 1-4, July.
    2. Carol Kilkenny & Nick Parsons & Ed Kadyszewski & Michael F W Festing & Innes C Cuthill & Derek Fry & Jane Hutton & Douglas G Altman, 2009. "Survey of the Quality of Experimental Design, Statistical Analysis and Reporting of Research Using Animals," PLOS ONE, Public Library of Science, vol. 4(11), pages 1-11, November.
    3. Carol Kilkenny & William J Browne & Innes C Cuthill & Michael Emerson & Douglas G Altman, 2010. "Improving Bioscience Research Reporting: The ARRIVE Guidelines for Reporting Animal Research," PLOS Biology, Public Library of Science, vol. 8(6), pages 1-5, June.
    4. Valerie C Henderson & Jonathan Kimmelman & Dean Fergusson & Jeremy M Grimshaw & Dan G Hackam, 2013. "Threats to Validity in the Design and Conduct of Preclinical Efficacy Studies: A Systematic Review of Guidelines for In Vivo Animal Experiments," PLOS Medicine, Public Library of Science, vol. 10(7), pages 1-14, July.
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    1. Lucile Vogt & Thomas S Reichlin & Christina Nathues & Hanno Würbel, 2016. "Authorization of Animal Experiments Is Based on Confidence Rather than Evidence of Scientific Rigor," PLOS Biology, Public Library of Science, vol. 14(12), pages 1-24, December.

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