title: Trends in biomedical informatics: automated topic analysis of JAMIA articles.
abstract: Biomedical Informatics is a growing interdisciplinary field in which research topics and citation trends have been evolving rapidly in recent years. To analyze these data in a fast, reproducible manner, automation of certain processes is needed. JAMIA is a "generalist" journal for biomedical informatics. Its articles reflect the wide range of topics in informatics. In this study, we retrieved Medical Subject Headings (MeSH) terms and citations of JAMIA articles published between 2009 and 2014. We use tensors (i.e., multidimensional arrays) to represent the interaction among topics, time and citations, and applied tensor decomposition to automate the analysis. The trends represented by tensors were then carefully interpreted and the results were compared with previous findings based on manual topic analysis. A list of most cited JAMIA articles, their topics, and publication trends over recent years is presented. The analyses confirmed previous studies and showed that, from 2012 to 2014, the number of articles related to MeSH terms Methods, Organization & Administration, and Algorithms increased significantly both in number of publications and citations. Citation trends varied widely by topic, with Natural Language Processing having a large number of citations in particular years, and Medical Record Systems, Computerized remaining a very popular topic in all years.
authors.affiliation: Health System Department of Biomedical Informatics, University of California San Diego, La Jolla, CA, 92093, USA School of Electrical and Computer Engineering, University of Oklahoma, Tulsa, OK, 74135, USA shw070@ucsd.edu.
authors.forename: Dong
authors.initials: D
authors.lastname: Han
authors.affiliation: Health System Department of Biomedical Informatics, University of California San Diego, La Jolla, CA, 92093, USA.
authors.forename: Shuang
authors.initials: S
authors.lastname: Wang
authors.affiliation: Health System Department of Biomedical Informatics, University of California San Diego, La Jolla, CA, 92093, USA School of Electrical and Computer Engineering, University of Oklahoma, Tulsa, OK, 74135, USA.
authors.forename: Chao
authors.initials: C
authors.lastname: Jiang
authors.affiliation: Health System Department of Biomedical Informatics, University of California San Diego, La Jolla, CA, 92093, USA.
authors.forename: Xiaoqian
authors.initials: X
authors.lastname: Jiang
authors.affiliation: Health System Department of Biomedical Informatics, University of California San Diego, La Jolla, CA, 92093, USA.
authors.forename: Hyeon-Eui
authors.initials: HE
authors.lastname: Kim
authors.affiliation: School of Computational Science and Engineering, Georgia Institute of Technology, Atlanta, GA, S30313, USA.
authors.forename: Jimeng
authors.initials: J
authors.lastname: Sun
authors.affiliation: Health System Department of Biomedical Informatics, University of California San Diego, La Jolla, CA, 92093, USA.
authors.forename: Lucila
authors.initials: L
authors.lastname: Ohno-Machado
mesh_terms: D015706:Bibliometrics; D035843:Biomedical Research / Q000639:trends*; D008490:Medical Informatics / Q000639:trends*; D046650:Medical Subject Headings; D010506:Periodicals as Topic; D012955:Societies, Medical
keywords: bioinformatics; biomedical informatics; citation analysis; medical subject headings; tensor factorization