Nature research paper: A multinational Delphi consensus to end the COVID-19 public health threat
One of the strengths of this study is its use of Delphi methodology. By demonstrating increased agreement with each subsequent round, this method enabled us to determine whether our incorporation of feedback was successful in refining the statements and recommendations, increasing the degree of consensus and, in some cases, reaching unanimity.
Although the Delphi method is a robust approach to assess levels of agreement on specific issues and explore whether a consensus can be reached, it is not without limitations. A main concern pertains to the construction of a truly representative expert panel. The sequential, multimethod sampling approach that we used minimized potential bias from purposive sampling of a small group and, instead, generated a large, geographically and disciplinarily diverse panel from multiple sources .
The core group then reviewed the panel list for under-represented countries and PubMed/Medline searches were conducted using the search term ‘COVID-19’ in combination with the names of under-represented countries to identify authors of COVID-19 research studies involving primary data collection in these countries. Authors of relevant studies were invited to participate in the Delphi panel to further increase geographical diversity and include panellists beyond the core team members’ networks.
To further validate the expertise of the panel, the study was described to the invitees with the following instructions: “If you consider your professional training and expertise applicable to the subject matter of this global consensus statement project, we encourage you to participate in the panel.
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