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Because of a lapse in government funding, the information on this website may not be up to date, transactions submitted via the website may not be processed, and the agency may not be able to respond to inquiries until appropriations are enacted. The NIH Clinical Center (the research hospital of NIH) is open. For more details about its operating status, please visit cc.nih.gov. Updates regarding government operating status and resumption of normal operations can be found at opm.gov.
Print Article: KA-03861

What information can I find on the ClinicalTrials.gov web site?

Each ClinicalTrials.gov record presents summary information about a study protocol and includes the following:

  • Disease or condition
  • Intervention (for example, the medical product, behavior, or procedure being studied)
  • Title, description, and design of the study
  • Requirements for participation (eligibility criteria)
  • Locations where the study is being conducted
  • Contact information for the study locations
  • Links to relevant information on other health Web sites, such as NLM's MedlinePlus® for patient health information and PubMed® for citations and abstracts of scholarly articles in the field of medicine

Some records also include information on the results of the study, such as:

  • Description of study participants (the number of participants starting and completing the study and their demographic data)
  • Outcomes of the study
  • Summary of adverse events experienced by study participants

The full history of the changes made to a record can be accessed by viewing the archival version of the record on the ClinicalTrials.gov archive. Once a study is registered on the site, the information about it is not removed.