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State of the Evidence 2021- Appendix

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The State of the Evidence report was created by conducting a title/keyword search in six electronic databases for both peer-reviewed and gray literature: Medline (PubMed), Google Scholar, MedNar, Cochrane Database of Systematic Reviews, World Wide Science, and WHO Global Index Medicus. Our completed search returned a total of 1,130 results, of which 736 were non-duplicates. After an initial title and abstract screening, 512 remained, and 442 were ultimately included after a separate round of full-text screening. We included sources if they were published in English in 2021, and if they contained insights or conclusions related to at least one of the following key categories:

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Resource Topic: CHW Role, Community Health Workers/Volunteers

Resource Type: Best practices, Case studies, Frameworks, Guide, Review, Tools, Training materials

Year: 2022

Region: Asia, Europe, Latin America and the Caribbean (LAC), Middle East and North Africa (MENA), North America (U.S. and Canada), Oceania, Sub-Saharan Africa (SSA)

Country: Global

Publisher May Restrict Access: No

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CHW Central is run by a team of dedicated volunteers and paid interns, with an annual operating budget of less than $20,000. In 2026, we have bold ambitions to further strengthen CHW associations, enhance opportunities for CHW organizing and information exchange, and make the latest research more accessible across the globe.

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