The PRISMA Extension Statement

Letters6 October 2015The PRISMA Extension StatementJin-hui Tian, PhD, Long Ge, MD, and Lun Li, PhDJin-hui Tian, PhDFrom Evidence-Based Medicine Center of Lanzhou University and Key Laboratory of Evidence-based Medicine and Clinical Translational Research of Gansu Province, Lanzhou; and The First Clinical Medicine College of Lanzhou University, Evidence-Based Medicine Center of Lanzhou University, and Key Laboratory of Evidence-based Medicine and Clinical Translational Research of Gansu Province, Lanzhou, China., Long Ge, MDFrom Evidence-Based Medicine Center of Lanzhou University and Key Laboratory of Evidence-based Medicine and Clinical Translational Research of Gansu Province, Lanzhou; and The First Clinical Medicine College of Lanzhou University, Evidence-Based Medicine Center of Lanzhou University, and Key Laboratory of Evidence-based Medicine and Clinical Translational Research of Gansu Province, Lanzhou, China., and Lun Li, PhDFrom Evidence-Based Medicine Center of Lanzhou University and Key Laboratory of Evidence-based Medicine and Clinical Translational Research of Gansu Province, Lanzhou; and The First Clinical Medicine College of Lanzhou University, Evidence-Based Medicine Center of Lanzhou University, and Key Laboratory of Evidence-based Medicine and Clinical Translational Research of Gansu Province, Lanzhou, China.Author, Article, and Disclosure Informationhttps://doi.org/10.7326/L15-5144 SectionsAboutFull TextPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinkedInRedditEmail TO THE EDITOR:We read Hutton and colleagues' much-anticipated PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-analyses) extension statement for reporting network meta-analyses (1) with interest. We have noted that 2 items, "information sources" (item 7) and "search" (item 8), remained from the original PRISMA statement. However, we all know that searching for the evidence in network meta-analyses is more important and more complex than doing so in traditional systematic reviews and pairwise meta-analyses (2). For example, the first step in preparing a network meta-analysis is a thorough and rigorous search for previous systematic reviews and meta-analyses to ensure ...References1. Hutton B, Salanti G, Caldwell DM, Chaimani A, Schmid CH, Cameron C, et al. The PRISMA extension statement for reporting of systematic reviews incorporating network meta-analyses of health care interventions: checklist and explanations. Ann Intern Med. 2015;162:777-84. [PMID: 26030634] doi:10.7326/M14-2385 LinkGoogle Scholar2. Golger S, Wright K. Searching for evidence.. In: Biondi-Zoccai G, ed., eds. Network Meta-analysis: Evidence Synthesis with Mixed Treatment Comparison. New York: Nova Science; 2014:63-76. Google Scholar3. Li L, Tian J, Tian H, Moher D, Liang F, Jiang T, et al. Network meta-analyses could be improved by searching more sources and by involving a librarian. J Clin Epidemiol. 2014;67:1001-7. [PMID: 24841794] doi:10.1016/j.jclinepi.2014.04.003 CrossrefMedlineGoogle Scholar Author, Article, and Disclosure InformationAffiliations: From Evidence-Based Medicine Center of Lanzhou University and Key Laboratory of Evidence-based Medicine and Clinical Translational Research of Gansu Province, Lanzhou; and The First Clinical Medicine College of Lanzhou University, Evidence-Based Medicine Center of Lanzhou University, and Key Laboratory of Evidence-based Medicine and Clinical Translational Research of Gansu Province, Lanzhou, China.Disclosures: Authors have disclosed no conflicts of interest. Forms can be viewed at www.acponline.org/authors/icmje/ConflictOfInterestForms.do?msNum=L15-0398. PreviousarticleNextarticle Advertisement FiguresReferencesRelatedDetailsSee AlsoThe PRISMA Extension Statement for Reporting of Systematic Reviews Incorporating Network Meta-analyses of Health Care Interventions: Checklist and Explanations Brian Hutton , Georgia Salanti , Deborah M. Caldwell , Anna Chaimani , Christopher H. Schmid , Chris Cameron , John P.A. Ioannidis , Sharon Straus , Kristian Thorlund , Jeroen P. Jansen , Cynthia Mulrow , Ferrán Catalá-López , Peter C. Gøtzsche , Kay Dickersin , Isabelle Boutron , Douglas G. Altman , and David Moher The PRISMA Extension Statement Brian Hutton , David Moher , and Chris Cameron The PRISMA Extension Statement Brian Hutton , David Moher , and Chris Cameron Metrics Cited bySARS-CoV-2 Persistence: Data Summary up to Q2 2020Biological and Chemo-Physical Features of Denture ResinsCOVID-19 Surface Persistence: A Recent Data Summary and Its Importance for Medical and Dental SettingsDental occlusion and sport performance3D Digital Impression Systems Compared with Traditional Techniques in Dentistry: A Recent Data Systematic ReviewPorphyromonas gingivalis, Periodontal and Systemic Implications: A Systematic ReviewBevacizumab in the neoadjuvant treatment of human epidermal growth factor receptor 2‑negative breast cancer: A meta‑analysis of randomized controlled trialsEpidemiology Characteristics, Methodological Assessment and Reporting of Statistical Analysis of Network Meta-Analyses in the Field of Cancer 6 October 2015Volume 163, Issue 7Page: 566KeywordsConflicts of interestDisclosureNetwork analysisSystematic reviews ePublished: 6 October 2015 Issue Published: 6 October 2015 Copyright & PermissionsCopyright © 2015 by American College of Physicians. 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