The Primary Completion Date is the date that the final subject was examined or received an intervention for the purposes of final collection of data for the primary outcome whether the clinical trial concluded according to the prespecified protocol or was terminated.
The Primary Completion Date (whether “actual” or “anticipated”) will be used by ClinicalTrials.gov to determine when results must be reported. Therefore, it is very important that this date be reviewed and appropriately updated by the “responsible party.” We recommend review of this date every 6 months (the required record update interval).
This date should remain as “anticipated” until the primary completion has been reached. Then, the responsible party must update the record with the “actual” Primary Completion Date and complete results reporting.
For more information:
Guidance: How to Determine Primary Completion Date