ClinicalTrials.gov provides free access to information on clinical studies for a wide range of diseases and conditions. Studies listed in the database are conducted in 175 countries

Prefix
clinicaltrials
Alternative Prefixes
clinicaltrial
Keywords
disease drug human
Links
Homepage
Contact
Missing Contact
Pattern for Local Unique Identifiers

Local identifiers in ClinicalTrials.gov ID should match this regular expression:
^NCT\d{8}$

Example Local Unique Identifier
NCT00222573   Resolve
Pattern for CURIES

Compact URIs (CURIEs) constructed from ClinicalTrials.gov ID should match this regular expression:
^clinicaltrials:NCT\d{8}$

Example CURIE
clinicaltrials:NCT00222573
Metaregistry ClinicalTrials.gov ID

The metaregistry provides mappings between the Bioregistry and other registries. There are 5 mappings to external registries for clinicaltrials with 2 unique external prefixes.

Registry Name Registry Metaprefix External Prefix Curate
BioContext biocontext CLINICALTRIALS
Identifiers.org Identifiers.org logo miriam clinicaltrials
Name-to-Thing Name-to-Thing logo n2t clinicaltrials
Prefix Commons prefixcommons clinicaltrials
Wikidata Property Wikidata Property logo wikidata P3098
Providers

Providers are various services that resolve CURIEs to URLs. The example CURIE clinicaltrials:NCT00222573 is used to demonstrate the provides available for clinicaltrials. Generation of OLS and BioPortal URLs requires additional programmatic logic beyond string formatting.

Name Metaprefix URI
ClinicalTrials.gov ID clinicaltrials https://clinicaltrials.gov/ct2/show/NCT00222573
Bioregistry bioregistry https://bioregistry.io/clinicaltrials:NCT00222573
Identifiers.org miriam https://identifiers.org/clinicaltrials:NCT00222573
Name-to-Thing n2t https://n2t.net/clinicaltrials:NCT00222573
None smartpatients https://www.smartpatients.com/trials/NCT00222573
Extra Providers

Additional providers curated in the Bioregistry are listed here.

Code Name URL
smartpatients Smart Patients https://www.smartpatients.com/trials/NCT00222573