Table 3.

Databases of Reported Trials

Database or Registry	No. of Reports	Comments
Australian Clinical Trials Registry	2	No longer active. Merged into Australian New Zealand Clinical Trials Registry (ANZCTR: http://www.anzctr.org.au) Managed by NHMRC Clinical Trials Centre, University of Sydney
Clinicaltrials.gov (http://www.clinicaltrials.gov)	112	Managed by US National Institutes of Health
European Clinical Trials Database (http://eudract.emea.europa.eu)	1	Not publicly searchable. Managed on behalf of the European Commission
International Standard Randomised Controlled Trial Number Register (http://www.isrctn.org)	30	Managed by Current Controlled Trials, Ltd (http://www.controlled-trials.com). Also contains a searchable meta-register of other trials databases
National Research Register	1	No longer active. Archive available at: http://portal.nihr.ac.uk/Pages/NRRArchive.aspx. Managed by UK National Health Service – National Institute for Health Research

Note: Eleven reports did not list a registration database.