• Int. J. Radiat. Oncol. Biol. Phys. · Apr 2019

    Continued Citation of Retracted Radiation Oncology Literature-Do We Have a Problem?

    • Daniel George Hamilton.
    • Division of Radiation Oncology and Cancer Imaging, Peter MacCallum Cancer Centre, Melbourne, Australia. Electronic address: danielh_00@hotmail.com.
    • Int. J. Radiat. Oncol. Biol. Phys. 2019 Apr 1; 103 (5): 1036-1042.

    PurposeThe purpose of this study was to quantify the number and explore the nature of citations of retracted articles in the radiation oncology literature occurring after publication of the retraction note.Methods And MaterialsA list of previously identified retracted articles within the field of radiation oncology was updated in June 2017. The number of publications citing retracted articles was quantified using Google Scholar, Web of Science, and Scopus. Studies citing retracted publications after publication of the retraction note were individually assessed to determine the nature of the reference.ResultsForty-seven retracted articles were identified for this study. Thirty-seven studies (79%) received 1017 citations before retraction, and 34 articles (72%) received 407 English and 169 foreign-language citations afterward. The average number of citations dropped from 22 to 11 after publication of the retraction note (95% confidence interval, 0.3-21.0, P = .043). Most postretraction citations occurred during the second year after the article's retraction, originated from North America and Asia (N = 124 each, 31%) and Europe (N = 122, 30%), and featured in original articles (N = 254, 62%) and reviews (N = 73, 18%). Of the 358 individually evaluable citing studies, 92% referenced the retracted article as legitimate work. Three guidelines and 15 systematic reviews and meta-analyses were also identified that cited retracted articles as valid work.ConclusionsPostretraction citations are an avoidable phenomenon. The results of the study emphasize the need for investigators to adhere to good research practices to mitigate the influence and propagation of flawed and unethical research. Journal editors, peer reviewers, and the broader radiation oncology readership should remain diligent in ensuring that citations of retracted work are identified and removed before, during, and possibly even after publication.Copyright © 2018 Elsevier Inc. All rights reserved.

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