Finding Randomised Controlled Trials

Resources to search for RCTs

Reports of randomised controlled trials (RCTs) have been found in the resources listed below for the PRACTIHC project and systematic reviews undertaken for the Cochrane Collaboration, the University of Leeds and Nottingham University. The starred * resources are recommended as a bare minimum set to search.

When selecting a manageable set of resources to search for a review its helpful to consider

  • subject matter and scope of the review
  • availability of the resource
  • time available to undertake searching
  • expertise of the searcher
  • download features of the resource for reference management

Key

* Recommended as the bare minimum sources to be searched for systematic reviews of RCTs
(S) Subscription required. Check if your institution subscribes
(International) Contains reports of trials from a variety of countries or reports of trials that are run across several countries
(OA) Contains Open Access, free full text articles

This page was last updated in December 2017. This is not a complete list of every source of RCTs. Currency, subscription requirements and open access availability can be difficult to verify, we apologies for any inaccuracies.

Please send details of additional RCT-holding sources or updated information on the content, currency, subscription and OA status of listed sources to the AUHE Information Specialists. We aim to update this web page every year.

Clinical Trials and Research Study Websites and Registers

International Databases

Grey Literature Resources

Regional and National Databases (WHO regions)

Africa

Americas

  • LILACS  Latin-American and Caribbean Center on Health Sciences Information
  • SciELO (FFT) Brazil Scientific Electronic Library Online

Eastern Mediterranean Region

Europe

South-East Asia

Thailand

Western Pacific

China

  • CNKI China National Knowledge Infrastructure (including China Academic Journals, China Conference Proceedings, China Dissertations) (S)
  • Chinese Biomedical Literature Database (CBM) (S)
  • VIP information/ Chinese Scientific Journals Database (S)
  • WanFang Data (S)

Japan

  • J-Stage Japanese Science &Technology Information Aggregator Electronic (OA)
  • iyakuSearch Clinical Trials Database Japan
  • ICHUSHI-Web Japan Medical Abstracts Society (S for full version)
  • CiNii National Institute Of Infomatics Japan (OA)
  • Medical Online (Meteo, Inc, Japan)
  • Webcat Plus (National Institute Of Infomatics Japan)

Databases that have not been verified as current or  accessible

Further links and guidance

AUHE Information Specialists Geographic Search Filter: Low and Middle Income Countries (Developing Countries) studies 2003-2020 ODA recipients

Norwegian Satellite of the Cochrane Effective Practice and Organisation of Care Group. LMIC Databases, a downloadable description of databases, websites and journals relevant to low and middle income countries (LMICs). 2013

Norwegian Satellite of the Cochrane Effective Practice and Organisation of Care Group. LMIC Filters for MEDLINE (Ovid), EMBASE (Ovid), PubMed and CENTRAL (Web), based on 2009 World Bank list of LMICs. 

Please send details of additional RCT-holding sources or updated information on the content and currency of listed sources to the AUHE Information Specialists. We aim to update this web page every year.

We acknowledge the support of the Cochrane Schizophrenia Group in developing this resource.