Conflicts of Interest at Medical Journals: The Influence of Industry-Supported Randomised Trials on Journal Impact Factors and Revenue – Cohort Study
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{"title"=>"Conflicts of interest at medical journals: The influence of industry-supported randomised trials on journal impact factors and revenue - cohort study", "type"=>"journal", "authors"=>[{"first_name"=>"Andreas", "last_name"=>"Lundh", "scopus_author_id"=>"24178937800"}, {"first_name"=>"Marija", "last_name"=>"Barbateskovic", "scopus_author_id"=>"36620818300"}, {"first_name"=>"Asbjørn", "last_name"=>"Hróbjartsson", "scopus_author_id"=>"6603742945"}, {"first_name"=>"Peter C.", "last_name"=>"Gøtzsche", "scopus_author_id"=>"35233694400"}], "year"=>2010, "source"=>"PLoS Medicine", "identifiers"=>{"sgr"=>"78149390160", "doi"=>"10.1371/journal.pmed.1000354", "pui"=>"359931439", "issn"=>"15491277", "pmid"=>"21048986", "isbn"=>"1549-1676", "scopus"=>"2-s2.0-78149390160"}, "id"=>"d551daad-f2a6-3163-b7cd-45dbb5305fbc", "abstract"=>"transparency in reporting of conflict of interest is an increasingly important aspect of publication in medical journals. Publication of large industry-supported trials may generate many citations and journal income through reprint sales and thereby be a source of conflicts of interest for journals. We investigated industry-supported trials' influence on journal impact factors and revenue.", "link"=>"http://www.mendeley.com/research/conflicts-interest-medical-journals-influence-industrysupported-randomised-trials-journal-impact-fac", "reader_count"=>143, "reader_count_by_academic_status"=>{"Unspecified"=>2, "Professor > Associate Professor"=>11, "Librarian"=>5, "Researcher"=>34, "Student > Doctoral Student"=>10, "Student > Ph. D. Student"=>23, "Student > Postgraduate"=>9, "Other"=>15, "Student > Master"=>13, "Student > Bachelor"=>11, "Professor"=>10}, "reader_count_by_user_role"=>{"Unspecified"=>2, "Professor > Associate Professor"=>11, "Librarian"=>5, "Researcher"=>34, "Student > Doctoral Student"=>10, "Student > Ph. D. Student"=>23, "Student > Postgraduate"=>9, "Other"=>15, "Student > Master"=>13, "Student > Bachelor"=>11, "Professor"=>10}, "reader_count_by_subject_area"=>{"Unspecified"=>9, "Agricultural and Biological Sciences"=>12, "Arts and Humanities"=>13, "Philosophy"=>2, "Business, Management and Accounting"=>3, "Chemistry"=>1, "Computer Science"=>6, "Earth and Planetary Sciences"=>1, "Economics, Econometrics and Finance"=>2, "Engineering"=>2, "Nursing and Health Professions"=>1, "Medicine and Dentistry"=>65, "Pharmacology, Toxicology and Pharmaceutical Science"=>2, "Psychology"=>7, "Social Sciences"=>14, "Linguistics"=>3}, "reader_count_by_subdiscipline"=>{"Medicine and Dentistry"=>{"Medicine and Dentistry"=>65}, "Social Sciences"=>{"Social Sciences"=>14}, "Psychology"=>{"Psychology"=>7}, "Unspecified"=>{"Unspecified"=>9}, "Pharmacology, Toxicology and Pharmaceutical Science"=>{"Pharmacology, Toxicology and Pharmaceutical Science"=>2}, "Arts and Humanities"=>{"Arts and Humanities"=>13}, "Engineering"=>{"Engineering"=>2}, "Chemistry"=>{"Chemistry"=>1}, "Earth and Planetary Sciences"=>{"Earth and Planetary Sciences"=>1}, "Economics, Econometrics and Finance"=>{"Economics, Econometrics and Finance"=>2}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>12}, "Computer Science"=>{"Computer Science"=>6}, "Business, Management and Accounting"=>{"Business, Management and Accounting"=>3}, "Nursing and Health Professions"=>{"Nursing and Health Professions"=>1}, "Linguistics"=>{"Linguistics"=>3}, "Philosophy"=>{"Philosophy"=>2}}, "reader_count_by_country"=>{"Republic of Singapore"=>1, "United States"=>4, "United Kingdom"=>4, "Spain"=>3, "Russia"=>1, "Canada"=>1, "Belgium"=>4, "Brazil"=>5, "Denmark"=>2, "Italy"=>1, "Mexico"=>3, "Algeria"=>1, "Nigeria"=>7, "France"=>2, "Australia"=>1, "Germany"=>1}, "group_count"=>11}

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Figshare

  • {"files"=>["https://ndownloader.figshare.com/files/821947"], "description"=>"<p>Relative income of journals and medical societies from sales of advertisements, reprints, and supplements and number of reprints sold in 2005–2006.</p>", "links"=>[], "tags"=>["journals", "societies", "supplements", "reprints", "sold"], "article_id"=>492311, "categories"=>["Medicine"], "users"=>["Andreas Lundh", "Marija Barbateskovic", "Asbjørn Hróbjartsson", "Peter C. Gøtzsche"], "doi"=>"https://dx.doi.org/10.1371/journal.pmed.1000354.t003", "stats"=>{"downloads"=>1, "page_views"=>6, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Relative_income_of_journals_and_medical_societies_from_sales_of_advertisements_reprints_and_supplements_and_number_of_reprints_sold_in_2005_8211_2006_/492311", "title"=>"Relative income of journals and medical societies from sales of advertisements, reprints, and supplements and number of reprints sold in 2005–2006.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2010-10-26 00:38:31"}
  • {"files"=>["https://ndownloader.figshare.com/files/409785"], "description"=>"<div><h3>Background</h3><p>Transparency in reporting of conflict of interest is an increasingly important aspect of publication in medical journals. Publication of large industry-supported trials may generate many citations and journal income through reprint sales and thereby be a source of conflicts of interest for journals. We investigated industry-supported trials' influence on journal impact factors and revenue.</p><h3>Methods and Findings</h3><p>We sampled six major medical journals (<em>Annals of Internal Medicine</em>, <em>Archives of Internal Medicine</em>, <em>BMJ</em>, <em>JAMA</em>, The <em>Lancet</em>, and <em>New England Journal of Medicine</em> [<em>NEJM</em>]). For each journal, we identified randomised trials published in 1996–1997 and 2005–2006 using PubMed, and categorized the type of financial support. Using Web of Science, we investigated citations of industry-supported trials and the influence on journal impact factors over a ten-year period. We contacted journal editors and retrieved tax information on income from industry sources. The proportion of trials with sole industry support varied between journals, from 7% in <em>BMJ</em> to 32% in <em>NEJM</em> in 2005–2006. Industry-supported trials were more frequently cited than trials with other types of support, and omitting them from the impact factor calculation decreased journal impact factors. The decrease varied considerably between journals, with 1% for <em>BMJ</em> to 15% for <em>NEJM</em> in 2007. For the two journals disclosing data, income from the sales of reprints contributed to 3% and 41% of the total income for <em>BMJ</em> and The <em>Lancet</em> in 2005–2006.</p><h3>Conclusions</h3><p>Publication of industry-supported trials was associated with an increase in journal impact factors. Sales of reprints may provide a substantial income. We suggest that journals disclose financial information in the same way that they require them from their authors, so that readers can assess the potential effect of different types of papers on journals' revenue and impact.</p><h3></h3><p><em>Please see later in the article for the Editors' Summary</em></p></div>", "links"=>[], "tags"=>["conflicts", "industry-supported", "randomised", "trials", "factors", "cohort"], "article_id"=>140939, "categories"=>["Medicine"], "users"=>["Andreas Lundh", "Marija Barbateskovic", "Asbjørn Hróbjartsson", "Peter C. Gøtzsche"], "doi"=>"https://dx.doi.org/10.1371/journal.pmed.1000354", "stats"=>{"downloads"=>0, "page_views"=>11, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/Conflicts_of_Interest_at_Medical_Journals_The_Influence_of_Industry_Supported_Randomised_Trials_on_Journal_Impact_Factors_and_Revenue_Cohort_Study/140939", "title"=>"Conflicts of Interest at Medical Journals: The Influence of Industry-Supported Randomised Trials on Journal Impact Factors and Revenue – Cohort Study", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2010-10-26 00:15:39"}
  • {"files"=>["https://ndownloader.figshare.com/files/821981"], "description"=>"a<p>For each journal citations are reported for their impact factor year (i.e., citations in 1998 to trials published in 1996–1997 and in 2007 to trials published in 2005–2006).</p>b<p>Difference in citations depending on type of support using Jonckheere-Terpstra test for trend (two-sided, support not stated excluded from the analysis).</p>", "links"=>[], "tags"=>["randomised", "trials", "published", "journals", "factors", "industry-supported"], "article_id"=>492347, "categories"=>["Medicine"], "users"=>["Andreas Lundh", "Marija Barbateskovic", "Asbjørn Hróbjartsson", "Peter C. Gøtzsche"], "doi"=>"https://dx.doi.org/10.1371/journal.pmed.1000354.t002", "stats"=>{"downloads"=>1, "page_views"=>5, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Citations_for_randomised_trials_published_in_major_general_medical_journals_and_change_in_impact_factors_when_industry_supported_trials_are_excluded_/492347", "title"=>"Citations for randomised trials published in major general medical journals and change in impact factors when industry-supported trials are excluded.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2010-10-26 00:39:07"}
  • {"files"=>["https://ndownloader.figshare.com/files/821898"], "description"=>"<p>*Comparison of number of trials with industry, mixed, and nonindustry support in 1996–1997 versus 2005–2006 using Mann-Whitney U-test (two-sided).</p>", "links"=>[], "tags"=>["randomised", "controlled", "trials", "published"], "article_id"=>492271, "categories"=>["Medicine"], "users"=>["Andreas Lundh", "Marija Barbateskovic", "Asbjørn Hróbjartsson", "Peter C. Gøtzsche"], "doi"=>"https://dx.doi.org/10.1371/journal.pmed.1000354.t001", "stats"=>{"downloads"=>1, "page_views"=>5, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Description_of_support_of_randomised_controlled_trials_published_in_major_general_medical_journals_/492271", "title"=>"Description of support of randomised controlled trials published in major general medical journals.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2010-10-26 00:37:51"}

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Relative Metric

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