Introduction: the PICO mnemonic is an evidence-based medicine tool that helps formulate the research questions needed to conduct the right search for scientific information. To properly classify this information, controlled languages or thesauruses are used for information retrieval. The aim was to identify whether the PICO search strategy in evidence-based medicine using the MeSH, Emtree and DeCS thesauruses answers a research question in the field of dentistry. Methods: to carry out the PICO strategy, a research question was formulated, identifying the natural language terms for each component of the PICO acronym, which were normalized into the three thesauruses to create the search equations. Results: 43 results were foundon Medline through PubMed, 5 on Embase, and 0 on LILACS. There were 4 original articles that answer the research question, proving to be an effective strategy for finding clinical evidence. Conclusion: this study shows that the strategy helps obtain results to answer the question posed. It should be noted that, in order to successfully search and retrieve information, researchers should use the PICO strategy and get familiar with the thesauruses that help structure search equations in the various bibliographic databases.
Objetivo. Identificar los mecanismos reportados en intervenciones de atención primaria en salud (APS) en poblaciones rurales y urbanas marginales entre los años 1997 y 2019. Métodos. Se utilizó el método de revisión sistemática exploratoria para identificar la literatura. La búsqueda de literatura fue realizada en las bases de datos Medline (Pubmed y Ovid), Global health, Embase, Web of science, Scopus y Lilacs. La inclusión de literatura consideró estudios de intervención primaria, observacionales con metodologías cualitativas, cuantitativas o mixtas. Se incluyeron artículos en inglés, portugués y español publicados entre 1997 y 2019. Para la selección de documentos definitivos se utilizó Rayyan QCRI, se excluyeron fuentes de información de literatura gris o investigación en progreso. Resultados. A nivel individual se identificaron tres grupos de mecanismos: niveles de relaciones entre las intervenciones y los sujetos, transformaciones que pueden generar en los individuos y las relaciones recíprocas. A nivel institucional se relacionaron con la temporalidad, el dinero, relaciones de poder, relaciones de confianza, el sistema de salud, las expectativas y las condiciones administrativas. Conclusiones. Los mecanismos individuales son similares en los diferentes contextos, los mecanismos institucionales son susceptibles a la variación del contexto, se representan en la temporalidad, recursos económicos, relaciones de poder y de confianza, el sistema de salud, las expectativas y condiciones administrativas.
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