2019
DOI: 10.1002/jrsm.1375
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Comparison of information sources used in Cochrane and non‐Cochrane systematic reviews: A case study in the field of anesthesiology and pain

Abstract: BackgroundIt has been reported that information sources searched in systematic reviews (SRs) are insufficiently comprehensive. We analyzed information sources used in SRs, as well as how up‐to‐date were the searches.MethodsWe searched PubMed and the Cochrane Database of Systematic Reviews (CDSR) through Wiley from 2012 to 2016 to find SRs of randomized controlled trials (RCTs) in the field of anesthesiology and pain. We analyzed information sources used and search dates.ResultsWe analyzed 674 SRs, including 37… Show more

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Cited by 9 publications
(5 citation statements)
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“…Comparing CSRs and nCSRs, the former present a higher proportion of omitted RCTs (59,2% vs. 35,4%, respectively). This may be a consequence of the fact that CSRs had more comprehensive searches (i.e., published sources and unpublished sources) [ 44 ], included sources with more often incomplete or hardly accessible data (i.e., congress abstracts, theses) and provided a list of excluded studies, being more methodologically rigorous and showing better reporting and higher quality [ 45 , 46 ] compared to nCSRs. Conversely, the majority of nCSRs (94/109) did not provide a list of excluded studies, thus reducing the number of RCTs assessed from nCSRs and underestimating the proportion of omitted RCTs from these sources.…”
Section: Discussionmentioning
confidence: 99%
“…Comparing CSRs and nCSRs, the former present a higher proportion of omitted RCTs (59,2% vs. 35,4%, respectively). This may be a consequence of the fact that CSRs had more comprehensive searches (i.e., published sources and unpublished sources) [ 44 ], included sources with more often incomplete or hardly accessible data (i.e., congress abstracts, theses) and provided a list of excluded studies, being more methodologically rigorous and showing better reporting and higher quality [ 45 , 46 ] compared to nCSRs. Conversely, the majority of nCSRs (94/109) did not provide a list of excluded studies, thus reducing the number of RCTs assessed from nCSRs and underestimating the proportion of omitted RCTs from these sources.…”
Section: Discussionmentioning
confidence: 99%
“…Consequently, we used reviews' definitions of conceptual framework elements. Furthermore, we used reviews from Cochrane and JBI because they follow a set of strictly established guidelines and undergo rigorous scrutiny [35][36][37], whereas other reviews do not necessarily have the same characteristics. Third, we did not address subfield differences.…”
Section: Discussionmentioning
confidence: 99%
“…As revisões sistemáticas elaboradas e publicadas pela Colaboração Cochrane são mundialmente reconhecidas pelo seu rigor metodológico e sua qualidade, uma vez que, geralmente, apresentam uma metodologia de busca de artigos científicos mais abrangente, apresentam mais fontes de informação e menor tempo médio entre a pesquisa e a publicação. (GOLDKUHLE et al, 2018;BIOCIC et al, 2019). Ademais, as revisões sistemáticas que não são produzidas pela Colaboração Cochrane tendem a diferir do seu protocolo (KOENSGEN et al, 2019) Diante do exposto, torna-se prudente não considerar as evidências de certeza baixa ou muito baixa para a TIC.…”
Section: A Revisão Da Cochraneunclassified