NIH Guide for Grants and Contracts
NIH-Defined Phase III Clinical Trial
An NIH-defined Phase III clinical trial is a broadly based prospective Phase III clinical investigation, usually involving several hundred or more human subjects, for the purpose of evaluating an experimental intervention in comparison with a standard or controlled intervention or comparing two or more existing treatments. Often the aim of such investigation is to provide evidence leading to a scientific basis for consideration of a change in health policy or standard of care. The definition includes pharmacologic, non-pharmacologic, and behavioral interventions given for disease prevention, prophylaxis, diagnosis, or therapy. Community trials and other population-based intervention trials are also included.
Notices posted in the NIH Guide for Grants and Contracts that succinctly highlight a specific topic of interest, for example a specific area of research or program. These notices direct applicants to one or more active funding opportunity announcements (often parent announcements) for submission of applications for the initiative described. Many program announcements will be issued as Notices of Special Interest going forward.