Table 1.
Descriptive statistics.
Fig 1.
Percentage of reviews with at least one contributor missing from the acknowledgements – overall.
We show that 381 reviews (40% of those that should have acknowledged prior authors) had at least one contributor missing from the acknowledgements.
Fig 2.
Percentage of reviews with at least one contributor missing from the acknowledgements – by Cochrane group.
We report the percentage of reviews omitting at least one non-author contributor for the top 20 Cochrane editorial groups based on the number of reviews included in the sample. The Fertility Regulation group had the highest percentage of reviews with at least one contributor not acknowledged (out of those that should have acknowledged prior authors).
Fig 3.
Percentage of reviews with at least one contributor missing from the acknowledgements – by publication year.
We report the percentage of reviews omitting at least one non-author contributor by year of publication. 41% of the eligible reviews (those that should have acknowledged prior authors) omitted at least one contributor from 2004 to 2013 (before we estimate the guidance was introduced) and 39% from 2014 to 2019 (after we estimate the guidance was introduced).
Table 2.
Reviews where all contributors were acknowledged vs those where at least one contributor was not acknowledged.
Table 3.
Correlates of omission from the acknowledgements.