articles supplied . The database is freely accessible on the Internet via the PubMed interface and new citations are added Tuesday through Saturday. [16] concluded that databases other than MEDLINE/PubMed did not change the outcomes of the review, while Rice et al. We aimed to determine the optimal combination of databases needed to conduct efficient searches in systematic reviews and whether the current practice in published reviews is appropriate. Lastly, access to databases is often limited and only available on subscription basis. - Offers proximity searching capability. Your privacy choices/Manage cookies we use in the preference centre. The sum of all these values is the total probability of acceptable recall in the random sample. The one review where it was insufficient was about alternative medicine, specifically meditation and relaxation therapy, where one of the missed studies was published in the Indian Journal of Positive Psychology. 2023 Mar 21. doi: 10.1007/s10926-023-10110-w. Online ahead of print. Nursing Research Databases | Nursing Journals | EBSCO Health Care Health Inf Libr J. Peer-reviewers try to make sure that the research was well-designed, that the statistics are accurately represented, and that the research is worthy of being shared, i.e. One explanation for our finding may be that if the research question is very specific, the topic of research might not always be mentioned in the title and/or abstract. In this case, the number of hits from Google Scholar was limited to 100. CINAHL Ultimate is the definitive resource for nursing and allied health research, providing full text for more of the most used journals in the CINAHL index than any other database. The growth of PubMed Central (PMC) and public access mandates have affected PubMed's composition. -, Coumou HC, Meijman FJ. Counterintuitively, a search that returns thousands of articles is not guaranteed to be comprehensive. 2021 May 6;16(5):e0234221. Cookies policy. Because precision is defined as the number of relevant references divided by the number of total results, we see a strong correlation with the total number of results. The MEDLINE database contains over 12 million references to scientific literature, with about 3/4 of recent articles including an abstract of the publication. 2013;30:4958. We searched PubMed in July 2016 for all reviews published since 2014 where first authors were affiliated to Erasmus MC, Rotterdam, the Netherlands, and matched those with search registrations performed by the medical library of Erasmus MC. statement and Why is MEDLINE a good database to use? There are disadvantages to using multiple databases. Of all reviews in which we searched CINAHL and PsycINFO, respectively, for 6 and 9% of the reviews, unique references were found. Part of In short, the method consists of an efficient way to combine thesaurus terms and title/abstract terms into a single line search strategy. 2017;33:21724. Together, these reviews included a total of 1830 references. doi: 10.1006/jbin.2001.1012. However, Embase is only accessible via a paid subscription, which generally makes it challenging for review teams not affiliated with academic medical centers to access. US Congress, Office of Technology Assessment (1982), United States National Library of Medicine, Learn how and when to remove this template message, "Internet Access to the National Library of Medicine", "Number of Titles Currently Indexed for Index Medicus and MEDLINE on Pubmed", "The proportion of cancer-related entries in PubMed has increased considerably; is cancer truly "The Emperor of All Maladies"? [17] found the added value of other databases only for newer, non-indexed references. 2014;30:1738. In 73 of these, the searches and results had been documented by the first author of this article at the time of the last search. Epub 2015 Dec 2. Thirty-seven references were found in MEDLINE (Ovid) but were not available in Embase.com. In general, we use the first 200 references as sorted in the relevance ranking of Google Scholar. Evidence-Based Research: MEDLINE Search Help - Academic Guides at How do primary care physicians seek answers to clinical questions? Whether Embase and Web of Science can be replaced by Scopus remains uncertain. In 23 reviews included in this research, Scopus was searched. To our surprise, Cochrane CENTRAL did not identify any unique included studies that had not been retrieved by the other databases, not even for the five reviews focusing entirely on RCTs. Health care professionals used 3.5 resources, on average, to aid in patient care. The recall of the database combinations was calculated over all included references retrieved by any database. For each published systematic review, we extracted the references of the included studies. What value is the CINAHL database when searching for systematic reviews 2 for the comparison of the recall of Embase, MEDLINE, and Cochrane CENTRAL per review for all identified domains. The X-axis represents the percentage of reviews for which a specific combination of databases, as shown on the y-axis, reached a certain recall (represented with bar colors). Using both Web of Science and Google Scholar in addition to MEDLINE and Embase increased the overall recall to 98.3%. $1,250. 2005;93:7480. Levay P, Raynor M, Tuvey D. The contributions of MEDLINE, other bibliographic databases and various search techniques to NICE public health guidance. Exploring PubMed as a reliable resource for scholarly communications While the database itself is unfiltered, you can still use it to find filtered, evidence-based practice resources, including systematic reviews. 2004;12:22832. It is laborious for searchers to translate a search strategy into multiple interfaces and search syntaxes, as field codes and proximity operators differ between interfaces. PubMed Searching multiple databases for systematic reviews: added value or diminishing returns? MEDLINE was the most likely to be among consulted resources compared to any other . MEDLINE is a great resource for medical research because it is authoritative, peer-reviewed, and complete (as much as possible, anyway). Med Ref Serv Q. Until 2016, the most complete MEDLINE selection in Ovid still lacked the electronic publications that were already available in PubMed. Syst Rev 6, 245 (2017). 3 for the legend of the plots in Figs. Halladay et al. Please enable it to take advantage of the complete set of features! We calculated the ratio between the number of results found when searching all databases, including databases not included in our analyses, such as Scopus, PsycINFO, and CINAHL, and the number of results found searching a selection of databases. For example, a search for myocardial infarction (the MeSH term for heart attack) will give you all articles about heart attacks regardless of whether the authors used the term myocardial infarction or heart attack. In 12 reviews (52%), Scopus retrieved 100% of all included references retrieved by Embase or Web of Science. 2017. doi:10.1002/jrsm.1279. A systematic approach to searching: how to perform high quality literature searches more efficiently. 2001 Apr;34(2):8598. doi: 10.1371/journal.pone.0234221. We are aware that the Cochrane Handbook [7] recommends more than only these databases, but further recommendations focus on regional and specialized databases. J Clin Epidemiol. WB has received travel allowance from Embase for giving a presentation at a conference. WB drafted the first manuscript, which was revised critically by the other authors. Ross-White A, Godfrey C. Is there an optimum number needed to retrieve to justify inclusion of a database in a systematic review search? Baseline data | definition of baseline data by Medical dictionary It is likely caused by difference in thesaurus terms that were added, but further analysis would be required to determine reasons for not finding the MEDLINE records in Embase. Before One of the interfaces for searching Medline is PubMed, provided by the NLM for free access via the Internet (www.pubmed.gov). Retrieval of entries using queries with keywords is useful for human users that need to obtain small selections. We estimate that 60% of published systematic reviews do not retrieve 95% of all available relevant references as many fail to search important databases. It may be that this will mark the beginning of a new era in medical bibliography. Performance of a search can be expressed in different ways. Aagaard T, Lund H, Juhl C. Optimizing literature search in systematic reviewsare MEDLINE, EMBASE and CENTRAL enough for identifying effect studies within the area of musculoskeletal disorders? Oermann MH, Wrigley J, Nicoll LH, Ledbetter LS, Carter-Templeton H, Edie AH. PubMed is free and publicly available: by using PubMed, researchers can search more than 30 million citations to the biomedical literature. J Med Libr Assoc. Evidence-Based Practice Point-of-Care Resources: A Quantitative Evaluation of Quality, Rigor, and Content. Have questions? On 5 January 2017, we searched PubMed for articles with the phrase systematic review in the title. Younger P. Internet-based information-seeking behaviour amongst doctors and nurses: a short review of the literature. J Psychosom Res. These descriptors are arranged in both, an alphabetic and a hierarchical structure 2. Of the five reviews that included only RCTs, four reached 100% recall if MEDLINE, Web of Science, and Google Scholar combined were complemented with Cochrane CENTRAL. Google Scholar. As a library, NLM provides access to scientific literature. Based on these calculations, we estimate that the probability that this random set of reviews retrieved more than 95% of all possible included references was 40%. Michaleff ZA, Costa LO, Moseley AM, Maher CG, Elkins MR, Herbert RD, Sherrington C. CENTRAL, PEDro, PubMed, and EMBASE are the most comprehensive databases indexing randomized controlled trials of physical therapy interventions. MEDLINE is the National Library of Medicine's (NLM) premier bibliographic database that contains references to journal articles in life sciences, with a concentration on biomedicine.. MEDLINE content is searchable via PubMed and constitutes the primary component of PubMed, a literature database developed and maintained by the NLM National Center for Biotechnology Information (NCBI). Examining the role of MEDLINE as a patient care information resource Started in the 1960s, it now provides more than 29 million references to biomedical and life sciences journal articles dating back to 1946. These values were calculated both for all reviews combined and per individual review. PubMed database contains more than 30 million references of biomedical literature from approximately 7,000 journals. We copied from the MeSH tree the top MeSH term directly below the disease category or, in to case of the intervention, directly below the therapeutics MeSH term. This study analyzed data from a study on the value of libraries to understand the specific role that the MEDLINE database plays in relation to other information resources that are available to health care providers and its role in positively impacting patient care. What is lost when searching only one literature database for articles relevant to injury prevention and safety promotion? Using a higher number of information resources was significantly associated with a higher probability of making changes to patient care and avoiding adverse events. Wilkins T, Gillies RA, Davies K. EMBASE versus MEDLINE for family medicine searches: can MEDLINE searches find the forest or a tree? To identify whether our searches had found the included references, and if so, from which database(s) that citation was retrieved, each included reference was located in the original corresponding EndNote library using the first author name combined with the publication year as a search term for each specific relevant publication. Using the prospectively recorded results and the studies included in the publications, we calculated recall, precision, and number needed to read for single databases and databases in combination. Would you like email updates of new search results? Stevinson C, Lawlor DA. The topics of the reviews studied here may simply have fallen into those categories, though the diversity of the included reviews may point to a more universal applicability. A review of meta-analyses. ", "PubMed related articles: a probabilistic topic-based model for content similarity", "How to read a paper: The Medline database", "PubMed Tutorial Building the Search - Search Tools - Journals Database", "Research Guides: Impact Factors, and other measures of scholarly impact: Indexing in Medline", "Predatory journals: The dark side of publications", "Research Guides: Predatory Publishing: MEDLINE vs. PubMed", "MGH Guides: Scholarly Communication: Predatory Journals", https://en.wikipedia.org/w/index.php?title=MEDLINE&oldid=1143955600, U.S. National Library of Medicine (United States), 40 languages for current journals, 60 for older journals. [4] This early system covered 239 journals and boasted that it could support as many as 25 simultaneous online users (remotely logged-in from distant medical libraries) at one time. Using MeSH terms in conjunction with limits (such as publication date or publication type), qualifiers (such as adverse effects or prevention and control), and text-word searching is another. MEDLINE is a great resource for medical research because it is authoritative, peer-reviewed, and complete (as much as possible, anyway). This situation continued through the beginning of the 1990s and the rise of the World Wide Web. Review projects at Erasmus MC cover a wide range of medical topics, from therapeutic effectiveness and diagnostic accuracy to ethics and public health. It is therefore important to search MEDLINE including the Epub Ahead of Print, In-Process, and Other Non-Indexed Citations references. The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health. MEDLINE did find unique references that had not been found in Embase, although our searches in Embase included all MEDLINE records. Site last updated in March 2008. PubMed serves as the search engine to access the MEDLINE database, PMC, and books, chapters, and other documents that are indexed by the NLM. Abbreviations: EM Embase, ML MEDLINE, WoS Web of Science, GS Google Scholar. Investigators and information specialists searching for relevant references for a systematic review (SR) are generally advised to search multiple databases and to use additional methods to be able to adequately identify all literature related to the topic of interest [1,2,3,4,5,6]. Bramer WM, Rethlefsen ML, Mast F, Kleijnen J. volume6, Articlenumber:245 (2017) Based on the number of results per database both before and after deduplication as recorded at the time of searching, we calculated the ratio between the total number of results and the number of results for each database and combination. MEDLINE also covers much of the literature in biology and biochemistry, as well as fields such as molecular evolution. In the other 48%, the recall by Scopus was suboptimal, in one occasion as low as 38%. We find that Embase is critical for acceptable recall in a review and should always be searched for medically oriented systematic reviews. Of the 11 references included in this review, one was found only in Google Scholar and one only in Web of Science.
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