title: Duplicate publication rate decline in Korean medical journals.
abstract: The purpose of this study was to examine trends in duplicate publication in Korean medical articles indexed in the KoreaMed database from 2004 to 2009, before and after a campaign against scientific misconduct launched by the Korean Association of Medical Journal Editors in 2006. The study covered period from 2007 to 2012; and 5% of the articles indexed in KoreaMed were retrieved by random sampling. Three authors reviewed full texts of the retrieved articles. The pattern of duplicate publication, such as copy, salami slicing (fragmentation), and aggregation (imalas), was also determined. Before the launching ethics campaign, the national duplication rate in medical journals was relatively high: 5.9% in 2004, 6.0% in 2005, and 7.2% in 2006. However, duplication rate steadily declined to 4.5% in 2007, 2.8% in 2008, and 1.2 % in 2009. Of all duplicated articles, 53.4% were classified as copies, 27.8% as salami slicing, and 18.8% as aggregation (imalas). The decline in duplicate publication rate took place as a result of nationwide campaigns and monitoring by KoreaMed and KoreaMed Synapse, starting from 2006.
authors.affiliation: Department of Family Medicine, Kandong Sacred Hospital, Hallym University College of Medicine, Seoul, Korea.
authors.forename: Soo Young
authors.identifier: 0000-0002-3205-9408
authors.initials: SY
authors.lastname: Kim
authors.affiliation: Department of Pediatrics, Kyung Hee University School of Medicine, Seoul, Korea.
authors.forename: Chong-Woo
authors.identifier: 0000-0002-0965-5674
authors.initials: CW
authors.lastname: Bae
authors.affiliation: Health Promotion Center, Chung-Ang University Hospital, Seoul, Korea.
authors.forename: Chang Kok
authors.initials: CK
authors.lastname: Hahm
authors.affiliation: Infolumi Co., Seongnam, Korea.
authors.forename: Hye Min
authors.initials: HM
authors.lastname: Cho
mesh_terms: D016208:Databases, Factual; D015713:Duplicate Publications as Topic; D006801:Humans; D018156:Journalism, Medical; D011643:Publishing / Q000941:ethics / Q000706:statistics & numerical data* / Q000639:trends; D056910:Republic of Korea; D012108:Research Personnel / Q000941:ethics
keywords: Duplicate Publication as Topic; Korea; Periodicals as Topic; Publishing Ethics; Trends