Evidence Synthesis inform healthcare policies, decisions making, interventions and public policies.
They can be defined as a review of existing research (systematic review, scoping review, rapid review...) in a systematic way as the agreed process for consistency and planned methodology.
Evidence can be a case study, report, randomized controlled trial, articles, policy, theory or data.
The evidence is synthesized which is evaluating and creating connections between the evidence and the literature.
Published outputs can include: protocol, methods section within a review or a published article in its own right.
Teamwork is essential.
This guide will introduce you the steps in the process or workflow for evidence synthesis which requires careful planning and project managing.
Project managing the various stages of the research workflow is key in order to manage time and expectations well and to be mindful of the time sequencing of outputs.
Sage Research Methods - Project Planner Tool - Planning and Practicalities
A methodology is the strategy which underpins the methods which are being used for synthesizing the evidence. Applying sound methodologies to determine the strength of the evidence (identifying, selecting, appraising and analyzing) to answer the questions posed.
Guidance Handbooks
Centre for Reviews and Dissemination
Cochrane Handbook for Systematic Reviews of Interventions
Joanna Briggs Institute Manual for Evidence Synthesis: Scoping Reviews
Methodological Expectations of Cochrane Intervention Reviews (MECIR)
Methodological Standards for the Research Covered in Campbell Reviews
Methods Guide for Effectiveness and Comparative Effectiveness Reviews (AHRQ)
Check for protocols and other synthesis types such as scoping reviews, rapid reviews, systematic literature reviews and mixed methods reviews.
Choosing the right synthesis type for your question is important and following the associated methodologies.
Cochrane Library a collection of databases which includes the Cochrane Database of Systematic Reviews.
Campbell Collaboration producing systematic reviews and evidence gap maps in areas such as crime, justice and education.
Open Science Framework (OSF)- open source project management tool for managing, storing, sharing research material.
PROSPERO an international register for protocols for some review types including systematic and rapid reviews.
There are many frameworks such as PEO, PICO, SPIDER, which can help to develop your research area and form your research question by:
Note: The research question may not always fit to a framework, what is important is that all the descriptors for concepts and terms have been identified to develop robust search strategies.
Develop a research - question - LibGuides at Duke University Medical Center
Munn, Z., Stern, C., Aromataris, E. et al. What kind of systematic review should I conduct? A proposed typology and guidance for systematic reviewers in the medical and health sciences. BMC Med Res Methodol 18, 5 (2018). https://doi.org/10.1186/s12874-017-0468-4.
Evidence-Based Research (EBR) is the overall context for guidance in the process for evidence synthesis:
“the use of prior research in a systematic and transparent way to inform a new study so that the research is answering questions that matter in a valid, efficient and accessible manner.” (EVBRES 2018).
EVBRES [2018] White paper for European Commission, “The need for an Evidence-Based Research approach in health science", CA 17117, evbres.eu.
The Glucksman Library Service Level Charter for Evidence-Based Research (EBR) presents a 3-tiered service to support researchers: