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Abstract
Purpose
Materials and methods
We
conducted a cross-sectional study of 399 high-impact biomedical
journals in 27 biomedical categories of the Journal Citation Reports
(JCR) in December 2011. Information relevant to COI and requirements for
disclosures that was publicly available on journal websites was
collected.
Results
While
financial COI disclosures were required by 358 (89·7%) and nonfinancial
by 280 (70·2%) journals, 155 (38·8%) required editors' disclosures.
Journals in the first decile of the JCR classification scored
significantly higher than those in the second decile for all disclosure
policies. Ninety (22·6%) journals were published by Elsevier and 59
(14·8%) by Wiley-Blackwell, with Elsevier scoring significantly better
in financial disclosure policies (P = 0·022). Clinical
journals scored significantly higher than basic journals for all
disclosure policies. No differences were observed between open-access (n = 25) and nonopen-access (n = 374)
journals for any type of disclosure. Somewhat incoherently, authors'
disclosure statements were included in some published manuscript in
57·1% of journals without any COI disclosure policies.
Conclusions
Authors'
financial COI disclosures were required by about 90% of high-impact
clinical and basic journals publishing original research. Unlike recent
studies showing a significantly lower prevalence of nonfinancial
compared with financial disclosures, the former were required by about
70% of journals, suggesting that editors are increasingly concerned
about nonfinancial competing interests. Only 40% of journals required
disclosure of editors' COI, in conflict with the recommendations of the
most influential editors' associations.
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