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Searching two or more databases decreased the risk of missing relevant studies: a metaresearch study

Ewald, Hannah ; Klerings, Irma ; Wagner, Gernot ; Heise, Thomas L. ; Stratil, Jan M. ; Lhachimi, Stefan K. ; Hemkens, Lars G. ; Gartlehner, Gerald ; Armijo-Olivo, Susan ; Nussbaumer-Streit, Barbara

Journal of clinical epidemiology, 2022-09, Vol.149, p.154-164 [Periódico revisado por pares]

United States: Elsevier Inc

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  • Título:
    Searching two or more databases decreased the risk of missing relevant studies: a metaresearch study
  • Autor: Ewald, Hannah ; Klerings, Irma ; Wagner, Gernot ; Heise, Thomas L. ; Stratil, Jan M. ; Lhachimi, Stefan K. ; Hemkens, Lars G. ; Gartlehner, Gerald ; Armijo-Olivo, Susan ; Nussbaumer-Streit, Barbara
  • Assuntos: Database coverage ; Information sources ; Intervention ; Literature search ; Rapid review ; Recall ; Reviews ; Risk reduction ; Search methods ; Search strategy ; Systematic review
  • É parte de: Journal of clinical epidemiology, 2022-09, Vol.149, p.154-164
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
  • Descrição: Assessing changes in coverage, recall, review, conclusions and references not found when searching fewer databases. In randomly selected 60 Cochrane reviews, we checked included study publications' coverage (indexation) and recall (findability) using different search approaches with MEDLINE, Embase, and CENTRAL and related them to authors' conclusions and certainty. We assessed characteristics of unfound references. Overall 1989/2080 included references, were indexed in ≥1 database (coverage = 96%). In reviews where using one of our search approaches would not change conclusions and certainty (n = 44-54), median coverage and recall were highest (range 87.9%-100.0% and 78.2%-93.3%, respectively). Here, searching ≥2 databases reached >95% coverage and ≥87.9% recall. In reviews with unchanged conclusions but less certainty (n = 2-8): 63.3%-79.3% coverage and 45.0%-75.0% recall. In reviews with opposite conclusions (n = 1-3): 63.3%-96.6% and 52.1%-78.7%. In reviews where a conclusion was no longer possible (n = 3-7): 60.6%-86.0% and 20.0%-53.8%. The 265 references that were indexed but unfound were more often abstractless (30% vs. 11%) and older (28% vs. 17% published before 1991) than found references. Searching ≥2 databases improves coverage and recall and decreases the risk of missing eligible studies. If researchers suspect that relevant articles are difficult to find, supplementary search methods should be used.
  • Editor: United States: Elsevier Inc
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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