Online Databases

UK Clinical Trials Gateway (UKCTG)

An online search tool allowing users to access information about trials of interest that are taking place in the UK.

UKCRN Study Portfolio Database

A searchable database of clinical trials which have been adopted by the UKCRN, providing access to study, site and recruitment information.

EU Clinical Trials Register

A public access database allowing users to search for information on clinical trials in European Union (EU) member states and the European Economic Area (EEA) and clinical trials which are conducted outside the EU/EEA if they form part of a paediatric investigation plan.


The UK Database of Uncertainties about the Effects of Treatments (UK DUETs) publishes treatment uncertainties from patients, carers, clinicians, and from research recommendations, covering a wide variety of health problems.

The aim is to make uncertainties explicit and help those prioritising research in the UK to take account of the information needs of patients, carers and clinicians. UK DUETs is part of NHS Evidence, provided by the National Institute for Health and Clinical Excellence (NICE).