The Primary Completion Date is the date that the final study participant was examined or received an intervention for the purpose of the final collection of data for the primary outcome. Similarly, the Study Completion Date is the date that the final study participant was examined or received an intervention for the purpose of the final collection of data for the primary and secondary outcome measures and adverse events (see the definitions in 42 CFR 11.10(a)).
The date that the final study participant was examined or received an intervention for the purpose of the final collection of data is the date of the examination or the administration of the intervention itself, not the date of any later assessment, analysis, or interpretation of the collected outcome or adverse event data. For example, if a participant was examined with a magnetic resonance imaging (MRI) scan for the primary outcome, the Primary Completion Date is the date that the last participant underwent the MRI, and not when the MRI was subsequently assessed using a central reading process or other review procedure. More information on this point is available in the Final Rule preamble. (81 FR 65019-20).
