Research registers may be regional, national or international registers of ongoing and completed research. They may record clinical trials as well as research conducted using other study designs. The following list is not comprehensive, but indicative of the type of registers which may be available in many countries and regions of the World.
Community Research and Development Information Service of the European Union (CORDIS)
International HTA database
UK Research and Innovation Gateway to publicly funded research and innovation (UK)
PROSPERO (Systematic reviews register)
Search the studies (USA)
Selected examples of disease-specific registers
Arthritis Research UK (ARC)
GREAT database (eczema)
RReACT Database (US database of registered analgesic clinical trials)
Retired databases
HSRProj (USA)
(UK) National Research Register
U.S Department of Health and Human Services register of existing mental health interventions (NREPP) - closed 2017
Updated 10 April 2023