German Clinical Trials Register: DRKS

This resource has its own search interface, but is also searchable under the ICTRP search portal.

The register contains over 14,000 studies (April 2023).

The English language introduction leads into a German and English search interface.

Search options

Default operator AND

Boolean operators AND, OR. Words can be excluded by prefixing with a minus sign (e.g. -cancer)

Phrase searching The help pages say that this does not work yet (13 April 2023)

Nesting Unclear

Truncation * (can be applied at the beginning or end of a word)

Field tags Fielded searching is available via the Extended Search.

Hyphens Hyphens are treated as a space

Help pages Yes

Example breast AND cancer

Saved searches No

Export tagged No

Updated 13 April 2023