| ctrdata-registers {ctrdata} | R Documentation |
Registers of clinical trials that can be accessed with package ctrdata as of September 2023.
EUCTR: The European Union Clinical Trials Register contains more than 43,500 clinical trials (using one or more medicines as investigational medicinal product, IMP; in the European Union and beyond)
CTGOV and CTGOV2: ClinicalTrials.gov includes more than 465,000 interventional and observational studies (both the current and the classic website are supported)
ISRCTN: The ISRCTN Registry includes almost 24,000 interventional or observational health studies
CTIS: The EU Clinical Trials Information System was started in January 2023, including 410 publicly accessible trials on 2023-11-22. How to automatically get a query URL: here
| Material | EUCTR | CTGOV | CTGOV2 | ISRCTN | CTIS |
| Home page | link | link | link | link | |
| About | link | link | link | link | link |
| Terms and conditions, disclaimer | link | link | link | link | link |
| How to search | link | link | link | link | link |
| Search interface | link | link | link | link | link |
| Glossary | link | link | link | link | |
| FAQ | link | link | link | link | |
| Expert / advanced search | link | link | link | link | |
| Example* | link | link | link | link | link |
| Definitions | link | link | link | link | link |
*The example is an expert search that retrieves interventional
trials with neonates, investigating infectious conditions:
The CTGOV expert search retrieves trials conducted exclusively with neonates.
It is not yet clear why different sets of trials are shown in CTGOV (65) and
CTGOV2 (14) for the same query parameters.
EUCTR retrieves trials with neonates, but not only those exclusively in neonates.
ISRCTN retrieves studies with interventions other than medicines.
Thus, after loading trials with ctrLoadQueryIntoDb
into a database collection, trials of interest have to be selected
in a second step, based on values of fields of interest
(e.g., using f115_children_211years from EUCTR for age criteria,
interventions.intervention.interventionType from ISRCTN for type of study),
which can be obtained from the collection using dbGetFieldsIntoDf.
Ralf Herold ralf.herold@mailbox.org