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Page History
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- Editorial, Administrative Changes (correction of minor typographical errors; clarifications made to previously approved descriptions of research)
- Data, Data Collection, and Data Collection Materials (revised study diaries; revised questionnaires or QOL surveys given to participants)
- Recruitment of Subjects (changes in the way subjects are recruited; a new or revised advertisement)
- Principal Investigator Contact Information
How to Update Trials
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An asterisk ( * ) at the end of a trial title indicates that the trial has alternate titles. |
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Make changes to the fields as necessary. The system requires you to provide information for all fields marked with an asterisk (*). The instructions are the same for trial registration and trial update, with some exceptions:
If applicable, enter an ClinicalTrials.gov Identifier, and then click Add ClinicalTrials.gov Identifier.
Note |
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You cannot change the ClinicalTrials.gov Identifier once you have added it. If you need to make changes thereafter, contact the CTRO at NCICTRO@mail.nih.gov. |
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A trial can accumulate program codes from different organization families. For example, a participating site might belong to a different organization family than the lead organization. When you update a trial, the Program Code field displays all codes from the master list for the organization family of the lead organization.
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Primary Completion Dates are optional for non-interventional trials and for DCP trials. In both cases, the system excludes such trials when submitting XML documents to ClinicalTrials.gov. Otherwise, Primary Completion Dates are required.
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For instructions on recording each field otherwise, refer to Registering New Trials.
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To open the trial record for editing, refer to Updating Trial Information.