All Reportable Event submissions require use of the most recent version of the Reportable Event Form. Please select the appropriate form for the type of event you are reporting:

What is a Reportable Event? How do I determine if an event should be submitted as a Reportable Event? When do I submit it?

A reportable event is an adverse event or incident that has the potential to be classified by the IRB as an unanticipated problem posing risks to participants or others. In general, an incident is determined to be a reportable event when it is both

(1) unexpected in terms of nature or severity or frequency

(2) probably or definitely related to participation in the research.

If you have identified an adverse event that meets these criteria, the IRB requires investigators to submit within 10 business days of discovery. HOWEVER- If the event involved a death and indicates that participants or others are at risk of increased harm, investigators should report within 3 days. If you do not have enough information to complete the Reportable Event form within this timeframe, you still must submit a Reportable Event Form. You should indicate that a follow up report will be provided once additional information has been obtained. You should also reach out to the IRB for additional guidance in these situations.

To better understand what types of events qualify for reporting within 10 business days, please review the list of the 3 common types of reported events and descriptions of the criteria used to determine whether the event is reportable


  • An event is considered “related to the research procedures” if the cause of the event is deemed probably or definitely related to the investigational product or a procedure that was performed for the purposes of the research.
  • A “suspected adverse reaction” could be considered a reportable event when there is reasonable possibility that the drug/investigational product caused the adverse event. For these reporting purposes, reasonable possibility means there is evidence to suggest a causal relationship between the drug/investigational product and the event
  • If the Sponsor determination notes a causal relationship between the event and the investigational drug/product without required revisions to the consent form or other study documents and/or the report indicates that the event does not alter the risk profile of the investigational drug/product, the event should not be classified as reportable
  • An event is “unexpected” if it is not accurately reflected in the protocol-related documents, such as the IRB-approved research protocol, the investigator’s brochure/package insert, or, the current IRB –approved informed consent document. An event can also be considered unexpected if is not listed at the specificity or severity that has previously been observed and described in the protocol-related documents.
  • “Unexpected” also refers to events that are mentioned in the investigator’s brochure/package insert as occurring with a class of drugs or as anticipated, but, are not mentioned as to have been


Any serious adverse effect on health or safety or any life-threatening problem or death caused by, or associated with, a device, if that effect, problem, or death was not previously identified in nature, severity, or degree of incidence in the investigational plan or application (including a supplementary plan or application), or any other unanticipated serious problem associated with a device that relates to the rights, safety, or welfare of subjects.


  • Withdrawal from marketing for safety concerns of a drug, device, or biologic used in a research protocol.
  • Complaint of a participant when the complaint indicates unexpected risks or the complaint cannot be resolved by the research team
  • Breach of confidentiality
  • Incarceration of a participant when the research was not previously approved under Subpart C and the investigator believes it is in the best interest of the subject to remain on the study
  • Premature completion of a study for any reason


What if I am not sure if an event meets the Reportable Event Criteria? What should I do if I determine that an event does not meet the definition of a Reportable Event?

What should I do if I am not sure if an event meets the criteria for a Reportable Event?

The IRB will accept reports when the investigator is unsure whether the event should be reported, and the IRB will review such reports to determine whether the event meets the threshold for an unanticipated event presenting risk to the participant.

Unnecessary reporting of events or problems that do not potentially affect the rights, welfare or safety of subjects in the study may impair the IRB’s ability to review and respond in a timely manner to actual situations where subject rights, welfare or safety are threatened.

The IRB will not acknowledge safety reports or bulk AE submissions that do not meet the criteria outlined above. These submissions will be returned.

The IRB encourages study teams to communicate this policy to sponsors and should use this document for verification as necessary.

What should I do if I determine that an event does not meet the definition of a Reportable Event?

  • Submit a narrative summary of all events that occurred during the approval year at the time of continuing review. This summary should include the rationale for why the event was not reportable.
  • Submit routine, periodic reports (e.g. DMC reports that indicate no changes, sponsor annual progress reports) to the IRB at continuing review
  • Please see the How to Submit Continuing Review page for additional guidance about summarizing adverse events in your continuing review submission.

How does the IRB review Reportable Events? What types of determinations are made?

IRB staff, members, and chairs will review your report to determine if it is complete. IRB personnel may ask you to provide additional information regarding the event.

If the IRB determines that the event did not meet the definition of a reportable event, the IRB will either return the event to you with notification that it does not meet our reporting criteria or issue an acknowledgment of the report.

If the event, meets the definition of a reportable event, the IRB will review the report to determine if it meets the definition of an unanticipated problem involving risk to participants or others. This may include review at a convened IRB meeting. Events that are determined to be unanticipated problems involving risks to participants or others will be reported according to SOP CO 602.

In addition, the IRB may determine whether any of the following are appropriate:

  • Accept report or with no additional requirements
  • Approve investigator’s proposed change
  • Administrative hold on the study pending IRB receipt of further information from the PI in a time period not to exceed 90 days
  • Modification of the protocol
  • Modification of the information disclosed during the consent process
  • Providing additional information to current participant the information may relate to the participant’s willingness to continue participation
  • Making arrangements for clinical care outside the research or additional follow-up for participants
  • Providing additional information to past participants
  • Requiring current participants to re-consent to participation
  • Alteration of the frequency of continuing review
  • Observation of the research or the consent process
  • Requiring additional training of the investigator
  • Notification of investigators at other sites
  • Obtaining additional information
  • Termination or suspension of the research; if this action is taken, the IRB Director will notify the Institutional Official to initiate any reporting actions; if the IRB does not consider the event to represent an unanticipated problem involving risks to participants or others, no further action