Research
Print page Print page
Switch language
The Capital Region of Denmark - a part of Copenhagen University Hospital
Published

Increasing number of authors in Cochrane reviews

Research output: Contribution to journalJournal articleResearchpeer-review

DOI

  1. Group authorships in Cochrane had low compliance with Cochrane recommendations

    Research output: Contribution to journalJournal articleResearchpeer-review

  2. Mammography screening in Norway caused substantial overdiagnosis and did not reduce late-stage breast cancers

    Research output: Contribution to journalComment/debateResearchpeer-review

  3. Targeting intensive glycaemic control versus targeting conventional glycaemic control for type 2 diabetes mellitus

    Research output: Contribution to journalLetterResearchpeer-review

  1. More than one-third of Cochrane reviews had gift authors, whereas ghost authorship was rare

    Research output: Contribution to journalJournal articleResearchpeer-review

  2. Group authorships in Cochrane had low compliance with Cochrane recommendations

    Research output: Contribution to journalJournal articleResearchpeer-review

  3. Half of Cochrane reviews were published more than 2 years after the protocol

    Research output: Contribution to journalJournal articleResearchpeer-review

View graph of relations

OBJECTIVE: To investigate authorship trends in Cochrane reviews from 1996 to 2018, and to examine if the authorship criteria from the International Committee of Medical Journal Editors (ICMJE) were met for Cochrane reviews with more than 15 authors based on the text in the section "Contributions of authors."

METHODS: The median number of authors per review was calculated, and authorship trends within each editorial group were analyzed. The section "Contributions of authors" was assessed about the first and second authorship criteria from the ICMJE for reviews with more than 15 authors.

RESULTS: A total of 7447 Cochrane reviews were studied based on data from the Cochrane Database of Systematic Reviews. The median number of authors per Cochrane review was 3 in 1996 (IQR 2.5-3, range 2-3), 4 in 2007 (IQR 3-5, range 1-13), and 5 in 2018 (IQR 4-7, range 2-22). Within each editorial group, the total number of authors either increased (26/55, 47%) or was unchanged (29/55, 53%). Based on the text in "Contributions of authors," 59% (16/27) of the reviews with more than 15 authors had authors that did not fulfil the ICMJE authorship criteria. However, the text in "Contributions of authors" was often difficult to interpret.

CONCLUSIONS: The number of authors per Cochrane review gradually increased from 1996 to 2018. The ICMJE authorship criteria were probably not met by all authors in more than half of the reviews with more than 15 authors.

Original languageEnglish
JournalJournal of Evidence-Based Medicine
Volume13
Issue number1
Pages (from-to)34-41
Number of pages8
ISSN1756-5383
DOIs
Publication statusPublished - Feb 2020

    Research areas

  • Authorship, Periodicals as Topic, Systematic Reviews as Topic

ID: 60646281