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The Guide to Community Preventive Services (The Community Guide) Go to site home page About the Task Force


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Evidence Gaps

A key component of the Task Force's work is to identify gaps in the evidence base.

  • When there is insufficient evidence to determine whether an intervention works, the Task Force suggests more research be done to assess effectiveness.
  • When the Task Force recommends an intervention, they highlight areas for research that would help users determine if the intervention will meet their needs. For example:
    • Will the intervention work everywhere for everyone?
    • How much will it cost to implement the intervention?
    • Will the intervention provide adequate return on investment?
    • How should users structure or deliver the intervention to ensure it is as effective as possible?

Filling these gaps could have a significant positive impact on public health, health disparities, and healthcare costs.

  • Individual scientists and program evaluators can develop studies to help fill these gaps.
  • Funding agencies can use evidence gaps to identify priority opportunities for targeted research and evaluation.

Find Evidence Gaps from Community Guide Reviews

Each topic and subtopic webpage includes a link in the left margin to "Supporting Materials." These pages list all related supporting materials, including Evidence Gaps where available.

Direct links to Evidence Gaps for individual reviews can also be found in the "Supporting Materials" section of each Intervention Summary Page. These summary pages can be accessed within each topic area, or through the All Task Force Findings list.


In some cases, particularly with older systematic reviews, information about Evidence Gaps is only available in published evidence reviews. Publications associated with each review are listed at the end of each Intervention Summary Page. You can also browse the entire Community Guide library.