How to use this website

Welcome to the Overview of Medical Research in the Netherlands (OMON), formerly the Dutch Trial register. On this website you may look for medical research. Check the Research participants page for more information on participating in medical research.

OMON currently includes all research from the old National Trial Register (NTR) and the CCMO register published on ToetsingOnline.nl. See the Professionals page for more information on managing research data and future developments.

The information from the old National Trial Register (NTR) is only available in English. The information from the CCMO register is available in both Dutch and English. In addition, the information may be outdated (such as 'Status of recruitment'). Therefore, when in doubt, always check with the submitting party of a study what the current status is. The submitting party is responsible for the data. Contact details for each study can be found under 'Contacts'.

Latest

The most recent news items:

'LTR becomes OMON'

From 5 March 2024 on, the research data on onderzoekmetmensen.nl will be known as 'Overview of Medical Research in the Netherlands' (OMON). This means the use of the name Dutch Trial Register (LTR) has thus been dropped.

The name 'Overview of Medical Research in the Netherlands' better reflects the different types of research that may be found in the overview. This change also brings medical research in teh Netherlands closer to a wider audience: not only professionals, but also potential research participants. To reinforce this, the layout of the website has been improved as well.

'Research from ToetsingOnline included in OMON'

From March 2024, studies from the CCMO-register on ToetsingOnline.nl are also visible in the Overview of Medical Research in the Netherlands (OMON). Following the earlier addition of the studies from the old National Trial Register (NTR), the addition of the studies from ToetsingOnline.nl is the second step in expanding the public research data on onderzoekmetmensen.nl. The studies will remain available at ToetsingOnline as well.

'OMON official data provider to WHO'

The World Health Organisation (WHO) accepted OMON as an official data provider. This means that studies registered in OMON meet the requirement of prospective registration set by the International Committee of Medical Journal Editors (ICMJE) for publication in scientific journals. Modifications are automatically included in the (International Clinical Trial Registry Platform (ICTRP).

Recognition applies to all research data in OMON: from the old NTR and from ToetsingOnline. When registering a study in ToetsingOnline, the investigator therefore immediately meets the aforementioned requirement for prospective registration. Studies need not also be registered in another recognised registry, such as Clinicaltrials.gov.